Baruch Spinoza

Men govern nothing with more difficulty than their tongues, and can moderate their desires more than their words.

I call him free who is led solely by reason.

The greatest pride, or the greatest despondency, is the greatest ignorance of one's self.

But with each passing year and each new study, the evidence for the genetic contribution to individual and group differences becomes more firmly established than ever.

My personal philosophy would be don't whine, don't let opportunities pass you by, be willing to work hard, and remember that you don't know as much as you think you do, ever.