It would be one of the greatest triumphs of humanity, one of the most tangible liberations from the constraints of nature to which mankind is subject, if we could succeed in raising the responsible act of procreating children to the level of a deliberate and intentional activity and in freeing it from its entanglement with the necessary satisfaction of a natural need.

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

Do you not know how uncontrolled and unreliable the average human being is in all that concerns sexual life?

He does not believe that does not live according to his belief.

We are never so defenseless against suffering as when we love, never so forlornly unhappy as when we have lost our love object or its love.

Taboo restrictions are distinct from religious or moral prohibitions. They are not based upon any divine ordinance, but may be said to impose themselves on their own account. They differ from moral prohibitions in that they fall into no system that declares quite generally that certain abstinences must be observed and gives reasons for that necessity.

He that has eyes to see and ears to hear may convince himself that no mortal can keep a secret. If his lips are silent, he chatters with his fingertips; betrayal oozes out of him at every pore.