Albert Barnes Commentary Psalms 119:29

"Remove from me the way of falsehood; And grant me thy law graciously." — Psalms 119:29 (ASV)

Remove from me - Take it from me; cause it to depart; let me not be under its influence or power.

The way of lying - Every false, deceitful, hypocritical way. We are not to suppose that the psalmist was addicted to lying, but that he felt he was, like all people, in danger of acting from false views, from wrong motives, or under the influence of delusion and deceit. It is a prayer that he might always be sincere and truthful. No man who knows his own heart can doubt the propriety of this prayer. On nothing does a man need more to examine himself; in nothing does he more need the grace of God, than that he may be sincere.

And grant me your law graciously - The knowledge of your law; grace to obey your law. The single word rendered “grant graciously” is a word which implies the idea of mercy or favor. It was not a thing which he claimed as a right; it was that for which he was dependent on the mercy of God.