The man who has grit enough to bring about the afforestation or the irrigation of a country is not less worthy of honor than its conqueror.

The most powerful factors in the world are clear ideas in the minds of energetic men of good will.

The chief end of science is to make things clear, the educative aim is to foster the inquisitive spirit.

Was it not the great philosopher and mathematician Leibnitz who said that the more knowledge advances the more it becomes possible to condense it into little books?

The Doctrine of Evolution states the fact that the present is the child of the past and the parent of the future.

A prolonged war in which a nation takes part is bound to impoverish the breed, since the character of the breed depends on the men who are left.

There is no counting the unsolved problems of Natural History.

Be ashamed to die until you have won some victory for humanity.

To succeed in your mission, you must aim at your goal with dedication and devotion

Nurture a tree today, and it will provide you fruit tomorrow.

Books, ' I say sleepily. 'They don't change either. If you read a book and look at it again later on, it's still the same thing. But it's exciting all over again.

People just don't understand, they aren't your level and they won't get there soon. So move because you will fall from there!

By his deeds we know a man.

Look for a way to lift someone up. If that's all you do, it's enough.

Once someone's hurt you, it's harder to relax around them, harder to think of them as safe to love. But it doesn't stop you from wanting them.

But inwardly we are as corrupt as the person who sits in an office and plans war-because, we want to be somebody in the family, in a group, in society, in the nation.

In the day of prosperity be joyful, but in the day of adversity consider.