Proverbs 30:5 - Joseph Benson’s Commentary on the Old and New Testaments

Every word of God is pure You must not expect the full knowledge of divine mysteries from me, nor from any man, but from the word of God, which is a certain rule, both for your faith and practice, because every part of it is holy, and true, and good, and there is not the least mixture of falsehood or folly in it, as there is in all the words and writings of men. He is a shield unto them that trust in him Which supposes their knowledge of him by his word, Psalms 9:10, and implies their reliance on his promises, joined with obedience to his commands.