Good, i.e. bountiful and gracious to sinners, ready to do good, and delighting in it. Upright, or, right, i.e. holy and true, sincere in making promises, and in all his declarations and offers of mercy to sinners, and faithful in fulfilling them. Being such a one, he will not be wanting to such poor sinners as I am, but will guide them by his word, and Spirit, and gracious providence into the way of life and peace. By sinners he doth not understand all that are so; not such as are obstinate, and proud, and scornful, whom God hath declared that he will not teach nor direct, but will leave them to the errors and lusts of their own hearts, and will blind and harden them to their ruin, as is often expressed in Scripture; but only such as, being truly sensible of their sins, do humbly and earnestly seek God for his grace and mercy, or such as are meek, as the next verse explains it; for these he will not fail to assist and relieve.
Related Commentaries of Psalms 25:8
Psalms 25:8
8 Good and upright is the LORD: therefore will he teach sinners in the way.