Men must concern themselves with food and with other physical needs, and they must protect themselves and their own from bodily harm, but these activities are not exclusively human. Many animals concern themselves with these things. But when we worship, pray, or feel compassion, when we enjoy a painting, a sunset or a sonata, when we think and reason, pursue ideas, seek truth, or read a book, when we protect the weak and helpless, when we honor the noble and cherish the good, when we cooperate with our fellow men to build a better world, our behavior is worthy of our status as human beings.