Alexander von Humboldt

The greatest danger to our planet is the belief that someone else will save it.

The contemplation of nature is a source of the purest and most lasting pleasures.

The universe is a single, interconnected whole, in which every part is dependent on every other part.

The study of nature is the best school for the human mind.

Nature is a net of indissoluble threads, and the human mind is but one of its many knots.

The finest works of art are those that reveal the most profound truths with the greatest simplicity.

What is the use of a great discovery if it does not lead to a greater one?

The only true wisdom is in knowing you know nothing.

Man is a part of nature, and his war against nature is a war against himself.

Every plant is a living monument to the wisdom of nature.

The greatest obstacle to discovery is not ignorance, but the illusion of knowledge.

The universe is a symphony, and we are but a single note.

To see the world in a grain of sand, and heaven in a wild flower.

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

Science is a voyage of discovery, not a destination.

The greatest scientists are artists as well.

The more I study nature, the more I am amazed at the wisdom of the Creator.

The only way to do great work is to love what you do.

The greatest discovery is to find oneself.

The world is full of magic, if only we have the eyes to see it.