Applied Psychology: Making Your Own World: Being the Second of a Series of Twelve Volumes on the

In Short

This 1914 manual introduces the mechanics of sensory perception to demonstrate that individuals hold ultimate authority over their daily experience. By detailing how outer stimuli filter through the nervous system to become conscious thought, the text argues that environment is built from within. It explains how to filter distractions, avoid optical illusions, and selectively focus on productive thoughts to achieve practical success. The book has endured as an early artifact of the New Thought and self-help movements, blending basic physiological science with actionable techniques for personal efficiency and mental discipline.

The Story

The volume opens by re-establishing three core premises: all human achievement requires physical action, all action is directed by the mind, and the mind is therefore the primary tool for accomplishing any objective. To use this instrument effectively, one must understand its foundational processes, starting with the sense-perceptive mechanism that gathers raw experience from the world.

The text moves into the mechanics of sensation, tracing how external reality reaches human awareness. Nothing is known directly. Light, sound, and touch must travel as environmental vibrations before striking the body's sensitive nerve ends. These messages pass through countless microscopic cells to the central brain, creating a measurable delay known as reaction-time. Because thousands of physical events intervene between an object and the conscious mind, the brain cannot process every incoming signal. It acts as a selective receiver, admitting only those impressions aligned with a person's immediate interests while dumping the remainder into the subconscious.

This reliance on sensory channels introduces vulnerabilities in the form of optical and physical illusions. Filled spaces appear larger than empty ones, bright colors alter perception of distance, and suggestive numbers alter human judgment of scale. The narrative demonstrates how these quirks of perception can be applied in practical environments, offering tests to measure an individual's breadth of attention, credulity, and resistance to distraction when choosing candidates for specific business roles.

Building on these limits of perception, the argument takes a philosophical turn toward the nature of environment. Because sensory data undergoes translation within the nervous system, no person can prove that physical matter exists independently of the mental image it creates. Closing one's eyes temporarily destroys the internal duplicate of an object. Thus, for any individual, the external world is effectively a collection of personal perceptions rather than an unchangeable outer reality.

The final section translates this concept into an actionable rule for self-mastery. While external stimuli strike the senses automatically, conscious perception remains an intentional choice. Individuals possess the option to select which impressions to evaluate and which to ignore. By tuning out irrelevant noises, gloomy thoughts, and emotional worries, a person creates an internal sanctuary of focus. The text concludes with the assertion that controlling one's attention allows anyone to reshape their environment, eliminate distractions, and achieve chosen goals through systematic mental discipline.

How It Unfolds

The foundation of mental action The author outlines three primary postulates establishing the mind as the essential tool for all human achievement. He defines the sense-perceptive process as the gatherer of raw sensory material and the judicial process as the reflective engine that works with those impressions.

The pathway of sensation The narrative traces environmental vibrations through the nervous system to the central brain, emphasizing the measurable delay called reaction-time. It explains how the brain acts as a selective filtering device, storing unheeded stimuli in the subconscious like unopened mail.

Exploiting sensory illusions The text details optical tricks involving line lengths, filled spaces, and visual contrast to highlight the unreliability of sense organs. It outlines specific laboratory-style tests using geometric shapes and error-checking tasks to evaluate job applicants for focus and detail orientation.

The mental construction of reality The argument asserts that human knowledge of the physical world consists entirely of internal mental images rather than direct contact with matter. Closing one's eyes destroys these internal duplicates, demonstrating that each person inhabits a world shaped by individual neural wiring.

Claiming practical self-mastery The book concludes by offering a method for mental discipline based on selective attention, illustrated by a story of a noisy Manhattan office worker. By exercising the choice to ignore disruptive sensations and toxic thoughts, the individual gains control over personal performance and destiny.

The People

The Individual Mind The central figure of the text is the conscious human mind seeking practical achievement. Driven by a desire for success and self-direction, it faces constant interference from an overwhelming flood of external stimuli and physical distractions. By learning the mechanics of perception, it evolves from a passive victim of circumstances into an active controller of its personal environment.

The Sensory Nerves Framed as an intricate network of microscopic messengers, the nervous system acts as the intermediary between the outer world and the brain. It gathers vibrations of light, sound, and pressure, translating physical impacts into biological signals. Though prone to errors and delays, this system delivers the raw data required for conscious thought and targeted physical action.

The Disrupted Worker Represented by an overwhelmed Wall Street broker, this figure illustrates the cost of unchecked sensory input. Struggling against the chaotic noise of a shared office, he suffers from severe headaches and poor productivity. Upon learning to selectively ignore unnecessary sounds, he masters his internal attention, proving that personal peace depends on internal choice rather than external quiet.

In Its Own Voice

"Your mind is like the receiving apparatus of the wireless telegraph which picks from the air those particular vibrations to which it is attuned." A practical explanation of how selective attention filters out chaotic background noise to focus solely on chosen priorities.

"If you perceive the table, must not your perception of it exist wholly within your own mind?" An inquiry challenging the reader to recognize that personal reality is built from internal mental pictures rather than raw physical matter.

"Pardon me if I leave with you an infallible recipe for peace in the midst of commotion: Hear only what you will to hear." A quiet piece of advice offered to a stressed office worker, revealing the power of intentional focus.

What It's Really About

This book explores the boundary between physical stimulus and mental awareness, arguing that human experience is entirely constructed within the mind. Beneath its practical advice for office management and focus lies a clear philosophical position: because individuals cannot directly touch external reality, they are free to choose which aspects of the world they allow into their consciousness. The work asserts that environment is not an unyielding physical reality, but a flexible series of mental pictures. True self-mastery requires using selective attention to block out negative thoughts, physical distractions, and emotional worry. By taking ownership of this filtering process, a person moves from being a helpless bystander to the active creator of their own life and success.

Why Read It Today

This work offers an engaging snapshot of early twentieth-century popular psychology, blending early neuroscience with the can-do optimism of the efficiency movement. Modern readers will recognize early versions of concepts now common in cognitive behavioral therapy, mindfulness, and ergonomics, such as using environmental filters to manage sensory overload and cognitive fatigue.

The prose is clear, direct, and energetic, framed with the earnest confidence of classic self-help literature. The book relies on period technology metaphors—comparing human nerves to telegraph wires and telephone switchboards—which gives the writing a distinct historic charm. While its scientific claims regarding physical matter and nerve biology reflect the popular understanding of 1914 rather than modern neuroscience, its underlying advice remains surprisingly practical. Readers interested in the history of mind-cure movements, early business psychology, or time-tested strategies for focus will find this a short, memorable, and thought-provoking guide to mastering the chatter of daily life.