We must not just patch and tinker with life. We must keep renewing it. Embrace novelty and uniqueness.

I wished by treating Psychology like a natural science, to help her become one.

Mental fire is what won't burn real sticks; mental water is what won't necessarily (though of course it may) put out even a mentalfire.

Nothing is so fatiguing as the eternal hanging on of an uncompleted task.

Effort is the one strictly undervalued and original contribution we make to this world.

General scepticism is the live mental attitude of refusing to conclude. It is a permanent torpor of the will, renewing itself in detail towards each successive thesis that offers, and you can no more kill it off by logic than you can kill off obstinacy or practical joking.

Begin to be now what you will be hereafter.