He that observeth the wind shall not sow; and he that regardeth the clouds shall not reap. – Ecclesiastes 11:4

Sow when the time comes, whatever wind blows. Reap when the times comes, whatever clouds are in the sky. There are, however, qualifying proverbs, which must influence our actions. We are not to discard prudence in the choice of the time for our work. “To every thing there is a season, and a time for every purpose under heaven.” It is well to sow when the weather is propitious. It is wise to “make hay while the sun shines.” Cut your corn when there is the probability of getting it dry. But Solomon here is pushing the other side of the matter. He had seen prudence turn to idleness; he had noticed some people wait for a more convenient season, which never came. He had observed sluggards making excuses, which did not hold water. So he, with a blunt word, generalizes, in order to make the truth more forcible. Not troubling about the exceptions to the rule, he states it broadly thus: “Take no notice of winds or clouds. Go on with your work whatever happens. ‘He that observeth the wind shall not sow; and he that regardeth the clouds shall not reap.'” A man may observe the wind, and regard the clouds a great deal too much, and so neither sow nor reap.

In any labour to which we set our hand, if we take too much notice of the difficulties, we shall be hindered in it. It is very wise to know the difficulty of your calling, the sorrow which comes with it, the trial which arises out of it, the temptation connected therewith; but if you think too much of these things, there is no calling that will be carried on with any success…Our hope is not in self, but in Christ; let us go and sow it. Our hope is in the finished work of Christ; let us go and reap it; for, if we keep on regarding the winds and the clouds, we shall neither sow nor reap. ~ C.H. Spurgeon

https://www.blueletterbible.org/comm/spurgeon_charles/sermons/2264.cfm