John Gill

Through thy precepts I get understanding,.... Of the will of God; of his worship, the nature and manner of it; of his ordinances, their use and importance; and of his doctrines, and the excellency of them; therefore I hate every false way; of worship; all superstition and will worship, the commandments and inventions of men, and every false doctrine; all lies in hypocrisy, for no lie is of the truth; every thing that is contrary to the word of God, and is not according to truth and godliness. The Targum is, "I hate every lying man.''