The transition from tenseness, self-responsibility, and worry, to equanimity, receptivity, and peace, is the most wonderful of all those shiftings of inner equilibrium, those changes of personal centre of energy, which I have analyzed so often; and the chief wonder of it is that it so often comes about, not by doing, but by simply relaxing and throwing the burden down.

Pessimism leads to weakness. Optimism leads to power.

Our belief at the beginning of a doubtful undertaking is the one thing that assures the successful outcome of any venture.

Human beings are born into this little span of life of which the best thing is its friendships and intimacies … and yet they leave their friendships and intimacies with no cultivation, to grow as they will by the roadside, expecting them to "keep" by force of mere inertia.

In youth we may have an absolutely new experience, subjective or objective, every hour of the day. Apprehension is vivid, retentiveness strong, and our recollections of that time, like those in a time spent in rapid and interesting travel, are of something intricate, multitudinous, and long-drawn-out. But as each passing year converts some of this experience into automatic routine which we hardly note at all, the days and the weeks smooth themselves out in recollection to a contentless unit, and the years grow hollow and collapse.

You can't out-perform your self-image.

The greatest empiricists among us are only empiricists on reflection: when left to their instincts, they dogmatize like infallible popes.