You live only once The logician would argue, You only live once should be rewritten as You live only once, with only next to the thing it qualifies, once. The logician would be unbearably pedantic, but there is a grain of good taste in the pedantry. Writing is often clearer and more elegant when a writer pushes an only or a not next to the thing that it quantifies. In 1962 John F. Kennedy declared, “We choose to go to the moon not because it is easy but because it is hard.” That sounds a lot classier than “We don’t choose to go to the moon because it is easy but because it is hard." Steven Pinker, The Sense of Style grammar
Your life adds up Weber's German word for a vocation, Beruf, contains two resonances: the gradual accumulation of knowledge and skills and the ever-stronger conviction that one was meant to do this one particular thing in one's life. An English locution roughly conveys what he meant: your life 'adds up'. Richard Sennett, The Craftsman All in & with the flowThe saddest designerI've designed it that wayFor something believed in worklife