What does Psalm 25:8 mean?

David acknowledges that the Lord is good and morally correct. For those who trust in Him, He never does anything eternally hurtful, but always what is in our best interest. His words and deeds are always right, therefore we can trust God at all times and in every situation. He is so good and upright that He guides sinners to salvation and a life of righteousness.

Isaiah depicts all human beings as sheep wandering away from God (Isaiah 53:6). But in love God provided the way back to Him through Jesus' redemptive work on the cross. Isaiah 53:6 also says, "the LORD has laid on him [Jesus, the Lamb of God] the iniquity of us all." Although the Lord delights to guide sinners to salvation, many are unwilling to receive His instruction. Jesus wept over Jerusalem and lamented, "O Jerusalem, Jerusalem, the city that kills the prophets and stones those who are sent to it! How often would I have gathered your children together as a hen gathers her brood under her wings, and you were not willing!" (Matthew 23:37).