Psalms 37:30

The Lord our God requires that we do justly, and render to all their due. It is a great sin for those that are able, to deny the payment of just debts; it is a great misery not to be able to pay them. He that is truly merciful, will be ever merciful. We must leave our sins; learn to do well, and cleave to it. This is true religion. The blessing of God is the spring, sweetness, and security of all earthly enjoyments. And if we are sure of this, we are sure not to want any thing good for us in this world. By his grace and Holy Spirit, he directs the thoughts, affections, and designs of good men. By his providence he overrules events, so as to make their way plain. He does not always show them his way for a distance, but leads them step by step, as children are led. God will keep them from being ruined by their falls, either into sin or into trouble, though such as fall into sin will be sorely hurt. Few, if any, have known the consistent believer, or his children, reduced to abject, friendless want. God forsakes not his saints in affliction; and in heaven only the righteous shall dwell for ever; that will be their everlasting habitation. A good man may fall into the hands of a messenger of Satan, and be sorely buffeted, but God will not leave him in his enemy's hands.

The mouth of the righteous speaketh wisdom. Where the whole Psalm is dedicated to a description of the different fates of the just and the wicked, it was meet to give a test by which they could be known. A man's tongue is no ill index of his character. The mouth betrays the heart. Good men, as a rule, speak that which is to edifying, sound speech, religious conversation, consistent with the divine illumination which they have received. Righteousness is wisdom in action, hence all good men are practically wise men, and well may the speech be wise. His tongue talketh of judgment. He advocates justice, gives an honest verdict on things and men, and he foretells that God's judgments will come upon the wicked, as in the former days. His talk is neither foolish nor ribald, neither vapid nor profane. Our conversation is of far more consequence than some men imagine.