Talk low, talk slow and don't say too much.

A mediocre idea that generates enthusiasm will go further than a great idea that inspires no one.

He who never made a mistake, never made a discovery.

Give up trying to make me give up

Nothing is black or white.

Parents can only give good advice or put them on the right paths, but the final forming of a person's character lies in their own hands

People think I'm a miserable sod but it's only because I get asked such bloody miserable questions.

I apologize for lying to you. I promise I won't deceive you except in matters of this sort.

There is a real magic in enthusiasm. It spells the difference between mediocrity and accomplishment

If one is to be called a liar, one may as well make an effort to deserve the name.

I speak for the trees, for the trees have no tongues.

We must not always talk in the market-place of what happens to us in the forest.

A moral being is one who is capable of reflecting on his past actions and their motives - of approving of some and disapproving of others

An original idea. That can't be too hard. The library must be full of them.

It is a mistake to think you can solve any major problems just with potatoes.

Circumstances do not make the man, they reveal him.

My idea of an agreeable person is a person who agrees with me.

Certainty? In this world nothing is certain but death and taxes.

I've always had an obligation to creation, above all.

All men are prepared to accomplish the incredible if their ideals are threatened.

The people I distrust most are those who want to improve our lives but have only one course of action.