It's coexistence or no existence.

I have found, for example, that if I have to write upon sum rather difficult topic, the best plan is to think about it with very great intensity-the greatest intensity of which I am capable-for a few hours or days, and at the end of that time give orders, so to speak (to my subconscious mind) that the work is to proceed underground. After some months I return consciously to the topic and find that the work has been done.

Religion and Science are two aspects of social life, of which the former has been important as far back as we know anything of man

What men really want is not knowledge but certainty.

Beware the man of the single book

If we were all given by magic the power to read each other's thoughts, I suppose the first effect would be to dissolve all friendships.

Boys and young men acquire readily the moral sentiments of their social milieu, whatever these sentiments may be.