Lessons learned from experience are the most lasting.

As much as one wishes to achieve something, the frailties of the human body often make it impossible.

Peace and quiet have great value. / Often the best choice is to say nothing.

(colloquial, rhetorical question) Am I the only one who thinks this?

An expression critical of committees — which by analogy can extend to both group decision-making as well as abstract or unrelated managerialism — by emphasizing the weaknesses of incorporating too many conflicting and inexperienced opinions into a single project. The distinguishing features of a camel, including its humps, plate-shaped feet, habitual spitting, strange shape and poor temperament, are treated as the sort of deformities that typify a conflicted, or overly idealistic, design process.

(idiomatic) The roles of people in a situation have been reversed, such that the advantage has shifted to a party which was previously disadvantaged.

Synonym of know what one is about

Used to ask the name of a man.

Used to ask the name of a woman. / Used to ask the name of a female animal.

Used to indicate surprise at how late in time it is.