Adam Clarke on Ecclesiastes 11:4

He that observeth the wind shall not sow! - The man that is too scrupulous is never likely to succeed in any thing. If a man neither plough nor sow till the weather is entirely to his mind, the season will in all probability pass before he will have done any thing: so, if thou be too nice in endeavoring to find out who are the impostors among those who profess to be in want, the real object may perish, whom otherwise thou mightest have relieved, and whose life might have been thereby saved. Those very punctilious and scrupulous people, who will sift every thing to the bottom in every case, and, before they will act, must be fully satisfied on all points, seldom do any good, and are themselves generally good for nothing. While they are observing the clouds and the rain, others have joined hands with God, and made a poor man live.