A time for every opposite, and God's work stands fixed
Human affairs swing between opposites, while what God has fixed can be neither added to nor taken away.
This present time is full of every kind of opposite: births, then deaths; the sprouting of plants, then their uprooting (Ecclesiastes 3:1-2); healings and killings, the building of houses and their pulling down (Ecclesiastes 3:3); weeping and laughter, mourning and dancing (Ecclesiastes 3:4). Now someone gathers what comes from the earth, and now he has thrown it away; at one time he is mad with passion for a woman, at another he loathes her (Ecclesiastes 3:5). Now someone has sought something, and now he has lost it; now he has kept it, and now he has let it go (Ecclesiastes 3:6); at one time he killed, at another he was killed; he spoke, then fell silent (Ecclesiastes 3:7); he loved, then hated (Ecclesiastes 3:8). For human affairs are now at war and now at peace (Ecclesiastes 3:8), as things swing quickly from what seemed good into what all admit is evil.
Let us stop, then, our useless toils (Ecclesiastes 3:9). For all these things, it seems to me, were set there to drive human beings into frenzy with venomous stings (Ecclesiastes 3:10). A wicked one who watches for his chance gapes greedily over this age, straining with all his might to destroy what God has formed, for he has chosen to make war on it from beginning to end (Ecclesiastes 3:11).
I am convinced, then, that the greatest goods for a human being are good cheer and doing good (Ecclesiastes 3:12), and that even this passing enjoyment comes from God only if righteousness guides one's actions (Ecclesiastes 3:13). But from the eternal and incorruptible things that God has firmly fixed, nothing can be taken away and nothing added (Ecclesiastes 3:14). Yet to anyone at all, those things are at once fearful and wonderful. What has come to be stands fast, and what is still to be has already come to be, in that it is foreknown; and the one who suffers wrong has God for his helper (Ecclesiastes 3:15).