"They go from strength to strength." There are various renderings of these words, but all of them contain the idea of progress. "They go from strength to strength." That is, they grow stronger and stronger. Usually, if we are walking we go from strength to weakness; we start fresh and in good order for our journey, but by and by the road is rough, and the sun is hot; so we sit down by the wayside and then resume our weary way.
But the Christian pilgrim, having obtained fresh supplies of grace, is as vigorous after years of weary travel and struggle as when he first set out. He may not be quite so elated and buoyant, nor perhaps quite so hot and hasty in his zeal as he once was, but he is much stronger in all that constitutes real power; and if he travels more slowly, he does so more surely.
Some gray-haired veterans have been as firm in their grasp of truth and as zealous in spreading it as they were in their younger days. But sadly, it must be confessed it is often otherwise, for the love of many grows cold, and iniquity flourishes; but this is their own sin and not the fault of the promise, which still holds good: "Even youths shall faint and be weary, and young men shall fall exhausted; but they who wait for the LORD shall renew their strength; they shall mount up with wings like eagles; they shall run and not be weary; they shall walk and not faint."1
Fretful spirits sit down and trouble themselves about the future. "Unfortunately," they say, "we go from affliction to affliction." Very true, O you of little faith; but you go from strength to strength also. You will never find a bundle of affliction that does not have in it somewhere sufficient grace. God will give the strength of ripe maturity along with the burden allotted to full-grown shoulders.