“When all the thoughts are concerning one thing and the person loses interest in other things, the melancholy begins.”

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

A herbarium is better than any illustration; every botanist should make one.

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.

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

Natural bodies are divided into three kingdomes of nature: viz. the mineral, vegetable, and animal kingdoms. Minerals grow, Plants grow and live, Animals grow, live, and have feeling.

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

A practical botanist will distinguish at the first glance the plant of the different quarters of the globe and yet will be at a loss to tell by what marks he detects them.

The species and the genus are always the work of nature [i.e. specially created]; the variety mostly that of circumstance; the class and the order are the work of nature and art.

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

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

No one has been a greater botanist or zoologist. No one has written more books, more correctly, more methodically, from personal experience. No one has more completely changed a whole science and started a new epoch.

It is the genus that gives the characters, and not the characters that make the genus.

If a tree dies, plant another in its place.

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

Nature does not proceed by leaps.

This drink has a magical power. It strengthens the weak, and revives those who have fainted. Those tired after work and physical activity can return their life forces by this drink much sooner than by nourishment. It works as a diuretic, an appetizer, an antitoxin.

If a path to the better there be, it begins with a full look at the worst.

I’m still at the beginning of my career. It’s all a little new, and I’m still learning as I go.

But then, I suppose, when with the benefit of hindsight one begins to search one’s past for such ‘turning points’, one is apt to start seeing them everywhere.

No, when the fight begins within himself, / A man’s worth something.

When I began to rap, I wasn’t taking it real serious. As I start seeing good things, it’s getting serious.

Prejudice, a dirty word, and faith, a clean one, have something in common: they both begin where reason ends.

In the beginning, before the arrival of the white men, I had considered myself neutral. I had wanted neither side to win, neither the army nor the rebels. As it turned out, both sides lost.

So valuable to heaven is the dignity of the human soul that every member of the human race has a guardian angel from the moment the person begins to be.