Madness is to think of too many things in succession too fast, or of one thing too exclusively.

Voltaire

I never think of the future. It comes soon enough.

Albert Einstein

A man cannot be comfortable without his own approval.

Mark Twain

Discipline is wisdom and vice versa.

M. Scott Peck

Many so-called disorders of the mind are simply disorders of thought.

Vironika Tugaleva

Find purpose. The means will follow.

Mahatma Gandhi