(idiomatic) Don't waste time on trivial issues

Alternative form of life is too short

(idiomatic) A soulmate; a one and only.

Alternative form of matter of life and death

Alternative form of take one's own life

Not endangering the continued life of the subject.

plural of quarter-life crisis

(psychology) A situation resembling the mid-life crisis but taking place earlier, when roughly a quarter of one's life has passed, typically in one's twenties or thirties.

plural of new lease on life

plural of work-life balance