What we call happiness in the strictest sense comes from the (preferably sudden) satisfaction of needs which have been dammed up to a high degree.

"He sido un hombre afortunado en la vida, nada me ha sido facil." "I've been a fortunate man in life, nothing has come easy"

If you want to endure life, prepare yourself for death.

Neither in my private life nor in my writings, have I ever made a secret of being an out-and-out unbeliever.

Let us consider the polarity of love and hate.... Now, clinical observation shows not only that love is with unexpected regularityaccompanied by hate (ambivalence), and not only that in human relationships hate is frequently a forerunner of love, but also that in many circumstances hate changes into love and love into hate.

There is no likelihood of our being able to suppress humanity's aggressive tendencies... Complete suppression of man's aggressive tendencies is not an issue; what we may try is to direct it into a channel other than that of warfare.

In the long run, nothing can withstand reason and experience, and the contradiction religion offers to both is palpable.