Madness is the result not of uncertainty but certainty.

Here the ways of men divide. If you wish to strive for peace of soul and happiness, then believe; if you wish to be a disciple of truth, then inquire.

We must understand how to hide in darkness in order to escape the gnat-swarms of utterly annoying admirers.

The first opinion that occurs to us when we are suddenly asked about something is usually not our own but only the current one pertaining to our class, position, or parentage; our own opinions seldom swim on the surface.

The vain.- We are like shop windows in which we are continually arranging, concealing or illuminating the supposed qualities other ascribe to us - in order to deceive ourselves.

He who has attained the freedom of reason to any extent cannot, for a long time, regard himself otherwise than as a wanderer on the face of the earth - and not even as a traveler towards a final goal, for there is no such thing. But he certainly wants to observe and keep his eyes open to whatever actually happens in the world; therefore he cannot attach his heart too firmly to anything individual; he must have in himself something wandering that takes pleasure in change and transitoriness.

The world is beautiful, but has a disease called man.