If a fortunate event has already occurred twice, a third fortunate event is likely to occur.

Present tense form of one thing led to another.

Alternative form of a little knowledge is a dangerous thing

(idiomatic) Something amazing, outstanding or praiseworthy, especially a relatively recent invention likely to improve people's lives.

(idiomatic) Alternative form of greatest thing since sliced bread

Nothing good lasts forever.

Men are only interested in sex.

(Ireland, idiomatic) Alternative form of greatest thing since sliced bread

Things should not be underestimated because of their small size.

Small gestures of help and kindness matter more than costly and exorbitant bestowals.