I am not young enough to know everything.

The advantage of the emotions is that they lead us astray.

I must decline your invitation owing to a subsequent engagement.

Philosophy teaches us to bear with equanimity the misfortunes of others.

Rich bachelors should be heavily taxed. It is not fair that some men should be happier than others.

Consistency is the last refuge of the unimaginative.

Sometimes you just have to regret things and move on.

Religion is a monumental chapter in the history of human egotism.

What and how much had I lost by trying to do only what was expected of me instead of what I myself had wished to do?

The aim of science is not to open the door to infinite wisdom, but to set a limit to infinite error.

As usual, there is a great woman behind every idiot.

It is better to have a permanent income than to be fascinating.

At the end of the day, let there be no excuses, no explanations, no regrets.

Trust is the lubrication that makes it possible for organizations to work.

I don't know the key to success, but the key to failure is trying to please everybody.