The introduction (vv. 1, 2) asserts, with an accent of assurance, the conviction which the psalmist had all but lost, and therefore had the more truly won. The initial word "Surely" is an indication of his past struggle, when the truth that God was good to Israel had seemed so questionable. "This I have learned by doubts; this I now hold as most sure; this I proclaim, impugn it who list, and seem to contradict it what may." The decisiveness of the psalmist's conviction does not lead him to exaggeration. He does not commit himself to the thesis that outward prosperity attends Israel. That God is good to those who truly bear that name is certain; but how He shows His goodness, and who these are, the psalmist has, by his struggles, learned to conceive of in a more spiritual fashion than before. That goodness may be plainly seen in sorrows, and it is only sealed to those who are what the name of Israel imports--"pure in heart." That such are blessed in possessing God, and that neither are any other blessed, nor is there any other blessedness, are the lessons which the singer has brought with him from the darkness, and by which the ancient faith of the well-being of the righteous is set on surer foundations than before. The avowal of conquered doubts follows on this clear note of certitude. There is a tinge of shame in the emphatic "I" of ver. 2, and in the broken construction and the change of subject to "my feet" and "my steps." The psalmist looks back to that dreary time, and sees more clearly than he did, while he was caught in the toils of perplexity and doubt, how narrow had been his escape from casting away his confidence. He shudders as he remembers it; but he can do so now from the vantage-ground of tried and regained faith. How eloquently the order of thought in these two verses speaks of the complete triumph over doubt!