It was a melancholy secret that reality can arouse desires but never satisfy them.

I mistrust the judgement of every man in a case in which his own wishes are concerned.

Nothing is as easy as it looks.

Every act of creation is first an act of destruction.

Wonder is the beginning of wisdom.

Thought can be so seductive and hypnotic that it absorbs your attention totally, so you become your thoughts.

Nobody made a greater mistake than he who did nothing because he could do only a little.

One who gains strength by overcoming obstacles possesses the only strength which can overcome adversity.

Every aquarium will eventually leak.

Empty pockets never held anyone back. Only empty heads and empty hearts can do that.

There's no sense in being precise when you don't even know what you're talking about.

To a wise and good man the whole earth is his fatherland.

Respect yourself if you would have others respect you.

There is no question climate change is happening. The only arguable point is what part humans are playing in it.

There is nothing noble in being superior to your fellow man; true nobility is being superior to your former self.

Nobody has the power to take two steps together; you can take only one step at a time.

How often I found where I should be going only by setting out for somewhere else.

A person reveals his character by nothing so clearly as the joke he resents.

Judge not unless you judge yourself.

A single lie destroys a whole reputation of integrity.

Yesterday I was clever, so I wanted to change the world. Today I am wise, so I am changing myself.