What does Psalm 103:17 mean?

God's unfailing love outlasts the span of human life. According to this verse it extends from everlasting to everlasting. It is eternal because it is an essential part of God's nature. First John 4:8 says, "God is love." Ephesians 1:4–5 tells us God predestined us in love. This startling truth indicates that from eternity past God loved those who would put their trust in His Son as their Savior.

David assures us that God's love is steadfast. He never stops loving His people. Even when we fail Him, His love for us does not fail. This is illustrated in the story of the prodigal son, who wandered far from his father. When that son returned home, he received full assurance that his father still loved him (Luke 15:11–32). When his father saw him returning, he felt compassion. Upon receiving his son, the father threw his arms around him and prepared a joyful celebration to welcome him home.

David adds to the description of God's attributes by noting that the Lord's righteousness extends to the posterity of those who reverence Him. He always does what is right and best for those in every generation who obey Him.