Of all the communities available to us, there is not one I would want to devote myself to except for the society of the true seekers, which has very few living members at any one time.
Imagination is more powerful than knowledge.
Common sense is the collection of prejudices acquired by age eighteen.
When the solution is simple, God is answering.
Fantasie is belangrijker dan kennis, want kennis is begrensd.
I was sitting in a chair in the patent office at Bern when all of a sudden a thought occurred to me: "If a person falls freely he will not feel his own weight." I was startled. This simple thought made a deep impression on me. It impelled me toward a theory of gravitation.