What does Psalm 108:4 mean?
David is credited with this psalm, the words of which are taken nearly word-for-word from Psalm 57:7–11 and Psalm 60:5–12. This statement (Psalm 57:10) also resembles David's remarks in Psalm 36:5.The Hebrew word checed implies the Lord's patient, loyal, steady love and concern for His people. The word is sometimes presented in English as "mercy" or "lovingkindness." The overall message of the Bible is that of a Creator (Genesis 1:1) who loves His creation and goes to great lengths to provide for it (John 3:16). Much of the Old Testament speaks of this incredible loyalty on God's part (Psalm 119:90; Jeremiah 31:3; Lamentations 3:23).
The concept of "faithfulness" or "truth" comes from the root word 'emet, which can also mean dependability or commitment. God possesses these traits to an extent the human mind cannot conceive. A common English expression for large quantities is "sky high," and David uses the same symbolic imagery here.