Psalms 18:6

6.In my distress, etc. It was a very evident proof of uncommon faith in David, when, being almost plunged into the gulf of death, he lifted up his heart to heaven by prayer. Let us therefore learn, that such an example is set before our eyes, that no calamities, however great and oppressive, may hinder us from praying, or create an aversion to it. It was prayer which brought to David the fruits or wonderful effects of which he speaks a little after, and from this it appears still more clearly that his deliverance was effected by the power of God. In saying that he cried, he means, as we have observed elsewhere, the ardor and earnestness of affection which he had in prayer. Again, by calling God his God, he separates himself from the gross despisers of God, or hypocrites, who, when constrained by necessity, call upon the Divine Majesty in a confused and tumultuous manner, but do not come to God familiarly and with a pure heart, as they know nothing of his fatherly favor and goodness. When, therefore, as we approach to God, faith goes before to illumine the way, giving us the full persuasion that He is our Father, then is the gate opened, and we may converse freely with Him and he with us. David, by calling God his God, and putting him on his side, also intimates that God was opposed to his enemies; and this serves to show that he was actuated by true piety and the fear of God. By the word temple we are not here to understand the sanctuary as in many other places, but heaven; for the description which immediately follows cannot be applied to the sanctuary. Accordingly, the sense is, that when David was forsaken and abandoned in the world, and all men shut their ears to his cry for help, God stretched forth his hand from heaven to save him.