The best thing about space travel is that it made it possible to go elsewhere.

It is impossible for a man to love his wife whole heartedly without loving all women somewhat. I suppose that the converse must be true of women.

Anything free costs twice as much in the long run or turns out worthless.

Belief gets in the way of learning.

Rarest of all is the man who can and does reason at all times, quickly, accurately, inclusively, despite hope or fear or bodily distress, without egocentric bias or thalmic disturbance, with correct memory, with clear distinction between fact, assumption, and non-fact.

A fake fortuneteller can be tolerated. But an authentic soothsayer should be shot on sight. Cassandra did not get half the kicking around she deserved.

The police of a state should never be stronger or better armed than the citizenry. An armed citizenry, willing to fight, is the foundation of civil freedom. That's a personal evaluation, of course.