While the sun, or the light, or the moon, or the stars, be not darkened - i.e., in the Spring, prime, and prosperity of life.
Nor the clouds return - The infirmities of old age of which Winter is a proper emblem, as spring is of youth, in the former clause of this verse.
While not - Or, Before. The darkening of the lights of heaven denotes a time of affliction and sadness. Compare Ezekiel 32:7-8; Job 3:9; Isaiah 5:30. Contrast this representation of old age with 2 Samuel 23:4-5.
“Remember now thy Creator in the days of thy youth,
While the evil days come not,
Nor the years draw nigh,
When thou shalt say, I have no pleasure in them;
PK 81.1
“While the sun,
Or the light,
Or the moon,
Or the stars,
Be not darkened,
Nor the clouds return after the rain:
PK 81.2
“In the day when the keepers of the house shall tremble,
And the strong men shall bow themselves,
And the grinders cease because they are few,
And those that look out of the windows be darkened,
And the doors shall be shut in the streets,
PK 81.3