Or perhaps you notice a congregation of ladybugs on a rose stalk. Don't invoke the old nursery saying and ask them to fly away home. Their house is not on fire. Your roses are, with aphids, which the ladybugs are feeding on - and you can bless yourself that they have come to your rescue.
Eleanor Perenyi (2010). “Green Thoughts: A Writer in the Garden”, p.173, Modern Library