Repetition:

The effect of repetition is often calculated to frighten. yet without similarity we cannot know the difference. And repetition is simply comforting, who doesn't have a fav food, a view, or piece of music, something sought out or returned to again and again for its ability to soothe and delight? The richness and texture of our lives increases dramatically from these successive forays, a kind of repetition over both time and space.