Psalms 54:2

God is faithful, though men are not to be trusted, and it is well for us it is so. David has no other plea to depend upon than God's name, no other power to depend upon than God's strength, and these he makes his refuge and confidence. This would be the effectual answer to his prayers. Looking unto David, betrayed by the men of Judah, and to Jesus, betrayed by one of his apostles, what can we expect from any who have not set God before them, save ingratitude, treachery, malice, and cruelty? What bonds of nature, or friendship, or gratitude, or covenant, will hold those that have broken through the fear of God? Selah; Mark this. Let us set God before us at all times; for if we do not, we are in danger of despair.

Hear my prayer, O God. This has ever been the defence of saints. As long as God hath an open ear we cannot be shut up in trouble. All other weapons may be useless, but all prayer is evermore available. No enemy can spike this gun. Give ear to the words of my mouth. Vocal prayer helps the supplicant, and we keep our minds more fully awake when we can use our tongues as well as our hearts. But what is prayer if God hear not? It is all one whether we babble nonsense or plead arguments if our God grant us not a hearing. When his case had become dangerous, David could not afford to pray out of mere custom, he must succeed in his pleadings, or become the prey of his adversary.