Charles Spurgeon Commentary Hebrews 12:10-12

"For they indeed for a few days chastened [us] as seemed good to them; but he for [our] profit, that [we] may be partakers of his holiness. All chastening seemeth for the present to be not joyous but grievous; yet afterward it yieldeth peaceable fruit unto them that have been exercised thereby, [even the fruit] of righteousness. Wherefore lift up the hands that hang down, and the palsied knees;" — Hebrews 12:10-12 (ASV)

But he for our profit, that we might be partakers of his holiness. Now no chastening for the present seemeth to be joyous, but grievous; nevertheless afterward it yieldeth the peaceable fruit of righteousness unto them which are exercised thereby. Wherefore lift up the hands which hang down, and the feeble knees;

Let not your service to God slacken. Lift up to God what was idly hanging down through despondency. Let not your prayers grow weak through grief, but strengthen the feeble knees.