O Lord, You are my God. The attribute of truth means that God absolutely dependable and without falseness of any kind. Veracity and fidelity are other descriptions that could be used in place of this word.
Truth is the conformity to fact or actuality.
All of God's plan, principles, and promises are completely reliable, accurate, real, and factual. In them are no falsehoods or lies. Your word is truth. No one comes to the Father except through Me. Now I, Nebuchadnezzar, praise and extol and honor the King of heaven, all of whose works are truth, and His ways justice.