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Phrase(s): Never trouble trouble till trouble troubles you.
Prov. If you think something might cause trouble, leave it alone and wait until it actually causes trouble. • Ellen: My daughter’s teacher is going to be troublesome, I can tell. Maybe I should go to the school and talk to her. Jane: Why not wait till she actually does something? Never trouble trouble till trouble troubles you.
McGrawhill's American Idioms And Phrasal Verbs