Ecclesiastes 11:5 - Joseph Benson’s Commentary on the Old and New Testaments

As thou knowest not the way of the spirit Of the soul of man, how it comes into the child in the womb; or how it is united with the body; or how, and whether it goes out of the body. Nor how the bones do grow That is, the whole body, which is elsewhere signified by the bones, because they are a principal part, and the very foundation and support of the body; that is, thou knowest not how, from small and unpromising beginnings, the various parts of the body, as nerves, arteries, veins, sinews, entrails, bones, flesh, and skin, are gradually formed, nourished, increased, and brought to perfection: even so thou knowest not the works of God What God is doing, and will do with thee or others; the counsels and methods of his providence in the future time of thy life, what evil God will send upon the earth, how he will chastise or punish mankind for their sins, or how long he will continue thy life, or preserve to thee the enjoyment of thy property; or how soon he will call thee to an account. Therefore use the present opportunity, and commit thyself and all thy affairs to him in well doing.