Give me understanding, and I shall keep your law; yea, I shall observe it with my whole heart.
Read Chapter 119
Augustine of Hippo
AD 430
34. "Give me understanding, and I shall search Thy law, yea, I shall keep it with my whole heart" (ver. 34). For when each man hath searched the law, and searched its deep things, in which its whole meaning doth consist; he ought indeed to love God with all his heart, with all his soul, with all his mind; and his neighbour as himself. "For on these two commandments hang all the Law and the Prophets." This he seemeth to have promised, when he said, "Yea, I shall keep it with my whole heart."
Heart. Enable me to keep and to understand thy law, ver. 1, 2. (Worthington)
We must observe what we know, that we may receive greater lights. (Haydock)