The sophists were as a rule men who had traveled widely and seen different forms of government. Both conventions and local laws in the city-states could vary widely. This led the Sophists to raise the question of what was natural and what was socially induced. By doing this, they paved the way for social criticism in the city-state of Athens.

When we die, as when the scenes have been fixed on to celluloid and the scenery is pulled down and burnt — we are phantoms in the memories of our descendants. Then we are ghosts, my dear, then we are myths. But still we are together. We are the past together, we are a distant past. Beneath the dome of the mysterious stars, I still hear your voice.

But understanding will always require some effort. You probably wouldn't admire a friend who was good at everything if it cost her no effort.

When we gaze at a star in the Milky Way which is 50,000 light-years away from our sun, we are looking back 50,000 years in time." "The idea is much too big for my little head." "The only way we can look out into space, then, is to look back in time. We can never know what the universe is like now. We only know what it was like then. When we look up at a star that is thousands of light-years away, we are really traveling thousands of years back in the history of space.

Although you may not stumble across a Martian in the garden, you might stumble across yourself. The day that happens, you'll probably also scream a little. And that'll be perfectly all right, because it's not every day you realize you're a living planet dweller on a little island in the universe.

going only part of the way is not the same as going the wrong way

Every single morning I wake with a bang,' he said. 'It's as though the fact that I am alive is injected into me; I am a character in a fairytale, bursting with life.