It is easy to be wise after the event proverbial saying, early 17th century, meaning that the difficult thing is to make a correct judgement without the benefit of hindsight.
it is a wise child that knows its own father proverbial saying, late 16th century, meaning that a child's legal paternity might not reflect an actual blood link.
Wise Men of Gotham fools (Gotham was proverbial for the folly of its inhabitants).
wise use environmental policy which favours stricter controls on existing methods of exploiting natural resources, as opposed to policies which seek either to find alternative resources or to prevent such exploitation altogether.
wise woman a woman considered to be knowledgeable in matters such as herbal healing, magic charms, or other traditional lore.
See also early to bed and early to rise, makes a man healthy, wealthy, and wise, a fool may give a wise man counsel, fools ask questions that wise men cannot answer, where ignorance is bliss, 'tis folly to be wise, one cannot love and be wise, three wise monkeys at monkey, penny wise and pound foolish, a word to the wise.