Botany is based on fixed genera.

If you do not know the names of things, the knowledge of them is lost, too.

It is not God, but people themselves who shorten their lives by not keeping physically fit.

In natural science the principles of truth ought to be confirmed by observation.

Nature does not proceed by leaps.

The plant kingdom covers the entire earth, offering our senses great pleasure and the delights of summer.

A professor can never better distinguish himself in his work than by encouraging a clever pupil, for the true discovers are among them, as comets amongst the stars.

Stones grow, plants grow, and live, animals grow live and feel.

Blessed be the Lord for the beauty of summer and spring, for the air, the water, the verdure, and the song of birds.

I demand of you, and of the whole world, that you show me a generic character... by which to distinguish between Man and Ape. I myself most assuredly know of none.

Nature's economy shall be the base for our own, for it is immutable, but ours is secondary. An economist without knowledge of nature is therefore like a physicist without knowledge of mathematics.

Multiply your potentials with your plans and it will be equal to your purpose of existence. Your potentials are your seeds of greatness.

The only place we can find a clear, i unmistakable message is in the Word of God [the Bible].

Having a great intellect is no path to being happy.

up upIf someone deprives you of history deprives you of your future

Some are Atheists by Neglect; others are so by Affectation; they, that think there is no God at some times; do not think so at all times.

There’s an old Chinese saying that I just love, and I believe it is so true. It goes like this: ‘The temptation to quit will be greatest just before you are about to succeed.’

This (Vietnam) was a land of rebellious barons. It was like Europe in the Middle Ages. But what were the Americans doing here? Columbus had not yet discovered their country.

China and the United States have major influence in international affairs and shoulder important responsibilities in upholding world peace and promoting common development.

My last book was speculative. I just don't quite know what I am doing. But I'll get there. I have a list of things I would love to write.

Man's most human characteristic is not his ability to learn, which he shares with many other species, but his ability to teach and store what others have developed and taught him.