The major milestones of a person's life: birth, marriage, and death.

(slang) To preside over the ceremonies surrounding birth and naming, marriage, and funerals or memorial services.

One should not depend upon a favorable (and typically overoptimistic) outcome to one's plans until it is certain to occur.

Alternative form of don't count your chickens before they're hatched

People who behave wickedly receive their just deserts.