Religion belonged to the infancy of humanity. Now that humanity had come of age, it should be left behind.

Cruelty and intolerance to those who do not belong to it are natural to every religion.

There is little that gives children greater pleasure than when a grown-up lets himself down to their level, renounces his oppressive superiority and plays with them as an equal.

In some place in my soul, in a very hidden corner, I am a fanatical Jew. I am very much astonished to discover myself as such in spite of all efforts to be unprejudiced and impartial. What can I do against it at my age?

Anxiety in children is originally nothing other than an expression of the fact they are feeling the loss of the person they love.

The poor ego has a still harder time of it; it has to serve three harsh masters, and it has to do its best to reconcile the claims and demands of all three...The three tyrants are the external world, the superego, and the id.

It is easy to see that the ego is that part of the id which has been modified by the direct influence of the external world.