Don't waste time on jealousy. Sometimes you're ahead, sometimes you're behind.

The sum of wisdom is that time is never lost that is devoted to work.

Who hears me, who understands me, becomes mine, a possession for all time.

I'm concentrating on staying healthy, having peace, being happy, remembering what is important, taking in nature and animals, spending time reading, trying to understand the universe, where science and the spiritual meet.

For one swallow does not make a summer, nor does one day and so too one day, or a short time, does not make a man blessed and happy.