Private passions tire and exhaust themselves, public ones never.

Ever more people today have the means to live, but no meaning to live for.

We may have different religions, different languages, different colored skin, but we all belong to one human race.

A man is not rightly conditioned until he is a happy, healthy, and prosperous being; and happiness, health, and prosperity are the result of a harmonious adjustment of the inner with the outer of the man with his surroundings.

No mortal can keep a secret. If the lips are silent, he chatters with his fingertips; betrayal oozes out of him at every pore.

It's funny how humans can wrap their mind around things and fit them into their version of reality.

A man's first care should be to avoid the reproaches of his own heart.

A man is great by deeds, not by birth.

The whole universe is contained within a single human being – you.

When people are protecting something truly special to them, they truly can become...as strong as they can be.

A person's a person, no matter how small.

Everywhere man blames nature and fate yet his fate is mostly but the echo of his character and passion, his mistakes and his weaknesses.

All of humanity's problems stem from man's inability to sit quietly in a room alone.

A desire to be observed, considered, esteemed, praised, beloved, and admired by his fellows is one of the earliest as well as the keenest dispositions discovered in the heart of man.

It is a waste of energy to be angry with a man who behaves badly, just as it is to be angry with a car that won't go.

How can you thank a man for giving you what's already yours? How then can you thank him for giving you only part of what is yours?

The first time someone shows you who they are, believe them.

I just invent, then wait until man comes around to needing what I've invented.

To live alone is the fate of all great souls.

There seems to be some perverse human characteristic that likes to make easy things difficult.

The greatest attitude of all is gratitude.