I would say the strategy in looking for life in the universe [should be] to look for what's detectable, not what's probable. We have a tendency among the theorists in this field to guess what's probable. In fact our guesses are likely to be wrong. We never had as much imagination as nature.-- Freeman Dyson, who imagines parabolic flowers spreading across the solar system.
For this is no Height in which there are not flowers.-- Christopher Smart.
Evolution is cleverer than you are.-- Orgel's second rule.