Next, Solomon draws on certain fixed laws in showing that irresoluteness in matters of life is not the best course. He notes: “If the clouds are filled with water, they empty out a sheer downpour upon the earth; and if a tree falls to the south or if to the north, in the place where the tree falls there it will prove to be.” (Eccl. 11:3) These things simply happen; they cannot be humanly controlled. So why be indecisive and hence hesitant about being generous or doing what needs to be done? If it is going to rain, it is going to rain. If a tree is going to fall a certain way, that is where it is going to fall. That is true of many other things in life. Inaction alone will not guarantee their not happening.
Ellicott's Commentary for English Readers
The world is ruled by fixed laws, the operation of which man has no power to suspend.