My love is something valuable to me which I ought not to throw away without reflection.

It would be very nice if there were a God who created the world and was a benevolent providence, and if there were a moral order in the universe and an after-life; but it is a very striking fact that all this is exactly as we are bound to wish it to be.

When we attempt to imagine death, we perceive ourselves as spectators.

Opposition is not necessarily enmity; it is merely misused and made an occasion for enmity.

Not all men are worthy of love.

The only person with whom you have to compare ourselves, is that you in the past. And the only per-son better you should be, this is who you are now.

I was making frequent use of cocaine at that time ... I had been the first to recommend the use of cocaine, in 1885, and this recommendation had brought serious reproaches down on me.