The traveler was active; he went strenuously in search of people, of adventure, of experience. The tourist is passive; he expects interesting things to happen to him. He goes 'sight-seeing.'

The greatest obstacle to discovery is not ignorance - it is the illusion of knowledge.

Some are born great, some achieve greatness, and some hire public relations officers.

Human models are more vivid and more persuasive than explicit moral commands.

The courage to imagine the otherwise is our greatest resource, adding color and suspense to all our life.

Freedom means the opportunity to be what we never thought we would be.

I write to discover what I think.

Knowledge is not simply another commodity. On the contrary. Knowledge is never used up. It increases by diffusion and grows by dispersion.

Technology is so much fun but we can drown in our technology. The fog of information can drive out knowledge.

We suffer primarily not from our vices or our weaknesses, but from our illusions. We are haunted, not by reality, but by those images we have put in their place.

No agnostic ever burned anyone at the stake or tortured a pagan, a heretic, or an unbeliever.

Some of our friends put our enemies out of work.

After five seconds there was a click, and the entire Universe was there in the box with him.

Look, architecture has a lot of places to hide behind, a lot of excuses. 'The client made me do this.' 'The city made me do this.' 'Oh, the budget.' I don't believe that anymore.

My soul, never laugh at sin's fooleries, lest thou come to smile at sin itself. It is thine enemy, and thy Lord's enemy.

Principles are only tools in the hands of God; they will soon be thrown away when they are no longer useful.

I've never had an easy relationship with critics. I hold a lot of homicide in my heart. If this was another time, I'd be packing a piece.

Today's practicality is often no more than the accepted form of yesterday's theory.

For those who never pray, maybe now you will. For those of us who attempt to pray, maybe we can pray more.

When he is sick, every man wants his mother.

Worldly wisdom thinks that love is a relationship between man and man. Christianity teaches that love is a relationship between man-God-man, that is, that God is the middle term.