Psalms 25:10 - Clarke's commentary and critical notes on the Bible

All the paths of the LORD are mercy and truth unto such as keep his covenant and his testimonies. All the paths of the Lord - ארחות orchoth signifies the tracks or ruts made by the wheels of wagons by often passing over the same ground. Mercy and truth are the paths in which God constantly walks in reference to the children of men; and so frequently does he show them mercy, and so frequently does he fulfill his truth that his paths are earnestly discerned. How frequent, how deeply indented, and how multiplied are those tracks to every family and individual! Wherever we go, we see that God's mercy and truth have been there by the deep tracks they have left behind them. But he is more abundantly merciful to those who keep his covenant and his testimonies; i.e. those who are conformed, not only to the letter, but to the spirit of his pure religion.