Light is the only connection we have with the Universe beyond our solar system, and the only connection our ancestors had with anything beyond Earth. Follow the light and we can journey from the confines of our planet to other worlds that orbit the Sun without ever dreaming of spacecraft. To look up is to look back in time, because the ancient beams of light are messengers from the Universe's distant past.
The gifts of microscopes to our understanding of cells and organisms is so profound that one has to ask: What are the gifts of the microscopist? Here is my opinion. The gift of the great microscopist is the ability to Think with the eyes and see with the brain. Deep revelations into the nature of living things continue to travel on beams of light.
A painting is more than the sum of its parts,' he would tell me, and then go on to explain how the cow by itself is just a cow, and the meadow by itself is just grass and flowers, and the sun peeking through the trees is just a beam of light, but put them all together and you've got magic.
When we set goals, we are in command. Clearly understood goals bring our lives into focus just as a magnifying glass focuses a beam of light into a burning point. Without goals our efforts may be scattered and unproductive