Truth is a torch, but a terrific one; therefore we all try to reach it with closed eyes, lest we should be scorched.
Men are joined by conviction, sundered by opinion.
If I say to the moment: 'Stay now! You are so beautiful'!
All things are only transitory.
As soon as any one belongs to a narrow creed in science, every unprejudiced and true perception is gone.
Hypotheses are only the pieces of scaffolding which are erected round a building during the course of construction, and which are taken away as soon as the edifice is completed.