Job 33:3
My words shall be of the uprightness of my heart: and my lips shall utter knowledge clearly.
My words shall be of the uprightness of my heart,.... Not that the uprightness of his heart, or his own personal integrity, should be the subject of his discourse; but what he should say would be in or out of the uprightness of his heart, with all sincerity and faithfulness; what would be the real sentiments of his mind, and not proceed from a double or insincere heart:
and my lips shall utter knowledge clearly; what knowledge he had of God, and of the perfections of his nature, and of his works in nature and grace, and of his dealings in a providential way with the sons of men; and what knowledge he had of Christ, his person, office, and grace somewhat of which speaks in this chapter; and such sort of knowledge is to be uttered, to be published, and made known to the good of others; and not to be concealed, and hid, or held, as in a prison, in unrighteousness; and to be uttered clearly, plainly, and distinctly, in words intelligible, and easy to be understood; and not in ambiguous terms, or in words of a double meaning; or which are abstruse and intricate, and serve rather to make the mysteries of Providence and grace more dark and obscure than to explain them; integrity of heart, and perspicuity of language, serve much to recommend a speaker, and both are expressed in this verse.