There is to my mind no doubt that the concept of beautiful had its roots in sexual excitation and that its original meaning was sexually stimulating.
The intention that man should be happy is not in the plan of Creation.
If you want to endure life, prepare yourself for death.
Dreams are often most profound when they seem the most crazy.
We are so made that we can derive intense enjoyment only from a contrast.
When it happens that a person has to give up a sexual object, there quite often ensues an alteration of his ego which can only be described as a setting up of the object inside the ego, as it occurs in melancholia; the exact nature of this substitution is as yet unknown to us.