No theory is good unless it permits, not rest, but the greatest work. No theory is good except on condition that one use it to go on beyond.

The abominable effort to take one's sins with one to paradise.

Old hands soil, it seems, whatever they caress, but they too have their beauty when they are joined in prayer. Young hands were made for caresses and the sheat…

Man is more interesting than men. God made him and not them in his image. Each one is more precious than all.

Our problem, from the point of view of psychology and from the point of view of genetic epistemology, is to explain how the transition is made from a lower lev…

The apple cannot be stuck back on the Tree of Knowledge; once we begin to see, we are doomed and challenged to seek the strength to see more, not less.

Thought is the wind, knowledge the sail.