The essence of genius is to know what to overlook.

Procrastination is attitude's natural assassin. There's nothing so fatiguing as an uncompleted task

We can change our circumstances by a mere change of our attitude.

It is wrong always, everywhere, and for everyone, to believe anything upon insufficient evidence.

Geniuses are commonly believed to excel other men in their power of sustained attention . . . But it is their genius making them attentive, not their attention making geniuses of them.

We must make automatic and habitual, as early as possible, as many useful actions as we can, and as carefully guard against the growing into ways that are likely to be disadvantageous.

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