Alexander von Humboldt

The most dangerous worldview is the worldview of those who have not viewed the world.

In the great chain of causes and effects, no single fact can be considered in isolation.

Nature everywhere speaks to man in a voice familiar to his soul.

What speaks to the soul escapes our measurements.

The sun and distant stars appeared to mingle in the perfection of the same natural order, and I felt, in the stillness of the tropical night, how much more alive and near to the heavens was this part of the earth.

Everything is interaction and reciprocal.

The blue of the sky compensates for the brevity of life.

I am more and more convinced that our happiness or unhappiness depends far more on the way we meet the events of life than on the nature of those events themselves.

People often say that I'm curious about too many things at once. But can you really forbid a man from harboring a desire to know and embrace everything that surrounds him?

The general equilibrium which reigns amongst disturbances and apparent chaos is the result of an infinity of mechanical forces and chemical attractions balancing each other out.