Negative attitudes wear us out. Assuming the worst will happen, focusing on just our faults, constant complaining, are attitudes that bring us down. If we stumble on a flight of stairs and feel embarrassed, it's going to feel even worse if we growl and curse. We'll feel much better if we laugh at ourselves and see the humor.
People want to be around those who are cheerful. The good cheer we send out will come back to us from others who are healthy. We can choose these cheerful people as our friends, and our happiness will grow and blossom in this good soil.