Make it a rule of life never to regret and never to look back. Regret is an appalling waste of energy; you can't build on it; it's only for wallowing in.
Could we change our attitude, we should not only see life differently, but life itself would come to be different. Life would undergo a change of appearance because we ourselves had undergone a change of attitude.
The mind I love must have wild places, a tangled orchard where dark damsons drop in the heavy grass, an overgrown little wood, the chance of a snake or two, a pool that nobody's fathomed the depth of, and paths threaded with flowers planted by the mind.