One should believe only what can be chosen to be true or just. Irrational (or unjustified) beliefs should be avoided because they can have disastrous practical consequences.

Only the stupid and the wicked can fear rational criticism.

I believe that modern science supports free will, in showing that the brain can act spontaneously, not only in response to external stimuli.

It is scandalous the way some scientists accept uncritically some of the most ridiculous speculations, such as the plurality of worlds, the opinion that spacetime has more than 4 dimensions, that particles can move faster than light, or that human life can be prolonged indefinitely.

It occurred to me that I had the duty to give society something in exchange for the free education I was getting.

Few if any political philosophers have had the courage of tackling the Cold War. Even the best of them have kept silent or have stated some bromides glossing over the serious shortcomings of "our" side, such as racism, social injustice, extreme income disparities, the exploitation of the Third World, and environmental degradation.

A distinguished cognitive neuroscientist confessed to me that, because of his religious upbringing, he could not get rid of psychoneural dualism. The idea that one ceases to be after death was too painful to him.