My mouth shall speak truth - Truth, without falsity, or any mixture of error, shall be the whole matter of my discourse.
Matthew Henry
Concise Bible Commentary
The will of God is made known by the works of creation, and by the consciences of men, but more clearly by Moses and the prophets. The chief difficulty is to get men to attend to instruction. Yet attention to the words of Christ, will guide the most ignorant into saving knowledge of the truth. Where there is an understanding heart, and willingness to receive the truth in love, wisdom is valued above silver and gold.