clouds - answering to “evil” (Ecc 11:2), meaning, When the times of evil are fully ripe, evil must come; and speculations about it beforehand, so as to prevent one sowing seed of liberality, are vain (Ecc 11:4).
tree - Once the storm uproots it, it lies either northward or southward, according as it fell. So man’s character is unchangeable, whether for hell or heaven, once that death overtakes him (Rev 22:11, Rev 22:14, Rev 22:15). Now is his time for liberality, before the evil days come (Ecc 12:1).