No human investigation can be called real science if it cannot be demonstrated mathematically. –Leonardo da Vinci

There have always been hard times. There have always been wars and troubles such as famine and disease, and some folks are born with money, some with none. In the end it is up to the man what he becomes, and none of those other things matters. It is character that counts. –Louis L'Amour

The most profound saying to remember is, "A still tongue makes a wise head." Do much thinking before you do much talking. –Alfred J. Parker

Every situation, properly perceived, becomes an opportunity. –Helen Schucman