“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.”

Prejudice, not being founded on reason, cannot be removed by argument.

If you are idle, be not solitary; if you are solitary be not idle.

The true measure of a man is how he treats someone who can do him absolutely no good.

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.

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’t test courage cautiously.

There are no easy answers’ but there are simple answers. We must have the courage to do what we know is morally right.

But sometimes it takes more courage to live than to shoot yourself.

The strong survive, but the courageous triumph.

I was bold in the pursuit of knowledge, never fearing to follow truth and reason to whatever results they led.

We must substitute courage for caution.

Those who have a strong sense of love and belonging have the courage to be imperfect.

What we know matters but who we are matters more.