The boundaries which divide Life from Death are at best shadowy and vague. Who shall say where the one ends, and where the other begins?

The weak can never forgive. Forgiveness is the attribute of the strong.

Circumstances do not make a man, they reveal him.

Every intelligent individual wants to know what makes him tick, and yet is at once fascinated and frustrated by the fact that oneself is the most difficult of all things to know.

The greatest of wealth is the richness of the soul.

You can be rich in spirit, kindness, love and all those things that you can't put a dollar sign on.

An understanding of the natural world is a source of not only great curiosity, but great fulfilment.

A mistake is always forgivable, rarely excusable and always unacceptable.

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

Sometimes one creates a dynamic impression by saying something, and sometimes one creates as significant an impression by remaining silent.

Learned we may be with another man's learning: we can only be wise with wisdom of our own.

There are things known and there are things unknown, and in between are the doors of perception.

Think globally, act locally.

A single lie destroys a whole reputation of integrity.

Adapt what is useful, reject what is useless, and add what is specifically your own.

He who conquers others is strong; he who conquers himself is mighty.

There is nothing more uncommon than common sense.

If you don't know where you're from, you'll have a hard time saying where you're going.

I write with experiences in mind, but I don't write about them, I write out of them.

Don't criticize what you don't understand, son. You never walked in that man's shoes.

You cannot truly listen to anyone and do anything else at the same time.