“Power is not sufficient evidence of truth.”

If a madman were to come into this room with a stick in his hand, no doubt we should pity the state of his mind; but our primary consideration would be to take care of ourselves. We should knock him down first, and pity him afterwards.

A horse that can count to ten is a remarkable horse, not a remarkable mathematician.

Nothing will ever be attempted if all possible objections must first be overcome.

Books like friends, should be few and well-chosen.

Curiosity is, in great and generous minds, the first passion and the last.

Sorrow is the mere rust of the soul. Activity will cleanse and brighten it.

There must always be a struggle between a father and son, while one aims at power and the other at independence.

A man who both spends and saves money is the happiest man, because he has both enjoyments.

The Irish are a fair people: They never speak well of one another.

Life affords no higher pleasure than that of surmounting difficulties.

Courage is the greatest of all virtues, because if you haven’t courage, you may not have an opportunity to use any of the others.

Patriotism is the last refuge of the scoundrel.

The superiority of some men is merely local. They are great because their associates are little.

Each person’s work is always a portrait of himself.

You can never be wise unless you love reading.

Whatever enlarges hope will also exalt courage.

Like a theory, we were. Declared. Never proven.

If the code does indeed have some logical foundation then it is legitimate to consider all the evidence, both good and bad, in any attempt to deduce it.

It would not be impossible to prove with sufficient repetition and a psychological understanding of the people concerned that a square is in fact a circle. They are mere words, and words can be molded until they clothe ideas and disguise.

I hold that it is only when we can prove everything we assert that we understand perfectly the thing under consideration.

I don’t entirely approve of some of the things I have done, or am, or have been. But I’m me. God knows, I’m me.

The ups and downs, the problems and stress, along with all the happiness, have given me optimism and hope because I am living proof of survival.

Bill [Gates] and I believe philanthropy can only be effective if it starts things and proves whether they actually work or not. That’s the place that governments often don’t want to, or can’t, work.

The balance of evidence both from the cell-free system and from the study of mutation, suggests that this does not occur at random, and that triplets coding the same amino acid may well be rather similar.