John Gill's Exposition of the Whole Bible
Lamentations 3:40
Let us search and try our ways,.... stead of murmuring and complaining, let us search for something that may support and comfort, teach and instruct, under afflictive providences; let us search into the love of God, which, though it cannot be fully searched out, it will be found to be from everlasting to everlasting; and that all afflictions spring from it; and that it continues notwithstanding them: let us search into the covenant of grace, in which provision is made for afflictions in case of disobedience, and for supports under them: let us search the Scriptures, which are written for our comfort; and it is much if we do not find some in the instances, examples, and experiences of other saints therein recorded: let us search after a greater degree of the knowledge of Christ, and of his grace; so shall we be more conformable to his sufferings and death, and patient under our troubles: let us search into our own hearts, and examine ourselves, whether we have true repentance for sin, true faith in Christ; and whether he is in us, or not; and we have a part in him, which will make us easy in every state: let us search into the present dispensation, in order to find out the cause of it, which is sin; and the end of it, which God has in it for our good: let us search "our ways", and "try them", by the word of God, the standard of faith and practice; and see what agreement there is between them: let us try our thoughts, words, and actions, by the law of God, which is holy, spiritual, just, and good; and we shall see how abundantly short they come of it: and let us try "our ways", and compare them with the ways of God, which he has prescribed in his word; and we shall find that the one are holy, the other unholy; the one plain, the other crooked; the one dark, the other light; the one pleasant, and peace is in them, the other not; the one lead to life, the other to death; see Isaiah 55:7;
and turn again to the Lord; by repentance, as the Targum adds; let us turn out of our sinful ways, upon a search and examination of them; and turn to the Lord, his ways and worship, from whom we have departed, and against whom we have sinned; acknowledging our iniquities, who receives graciously, is ready to forgive, and does abundantly pardon.