I've never had anyone define purity. You probably can't define purity. Purity is to live according to original design.

If you ant to feel deeply, you have to think deeply. Too often we separate the two. We assume that if we want to feel deeply, then we need to sit around and, well, feel. But emotion built on emotion is empty. True emotion- emotion that is reliable and does not lead us astray- is always a response to reality, to truth.

True purity, however, is a direction, a persistent, determined pursuit of righteousness. This direction starts in the heart, and we express it in a lifestyle that flees opportunities for compromise.

If you want to have sustained joy, you have to not only make sure that you think right, but you also have to make decisions now that are going to guarantee some joy in the future.

You cannot have a positive life and a negative mind.

In avoiding the appearance of evil, I am not sure but I have sometimes unnecessarily deprived myself and others of innocent enjoyments.

Innovation is a good thing. The human condition - put aside bioterrorism and a few footnotes - is improving because of innovation.

Build a cell inside your mind, from which you can never flee.

I always felt like my value was much more in my intellect than it was in my appearance, and so that's what I spent time cultivating. And some of that I get from my mother, some of that comes from the schools that I went to, and some of that comes from probably insecurity.

It's like an act of murder; you play with intent to commit something.

Every minute you are thinking of evil, you might have been thinking of good instead. Refuse to pander to a morbid interest in your own misdeeds. Pick yourself up, be sorry, shake yourself, and go on again.

It is the mark of a truly educated man to know what not to read.