John Trapp on Psalms 4:3

Verſ. 3. But know that the Lord hath ſet apart him that is godly] Quod ſeparatum aſſeruerit, that God hath deſtined mine head to the Diadem of the Kingdom, and therefore it ſhall not be in your power to hinder me: Sith voluntas Dei, neceſſitas Rei, and this I would have you to know, and reſt aſſured of. Let us be no leſs confident of the Crown of Glory, Luke 12.32. Fear not little flock, for it is your Fathers good pleaſure to give you a kingdom. And 2 Tim. 2.19. The foundation of God abideth ſure, having this double ſeal, i. e. The Lord (for his part) knoweth who are his; and we, for our parts may know, that if we but name the name of the Lord in prayer, and depart from evil, we ſhall certainly be ſaved.

The Lord will hear when I call unto him] Being that I am a godly man, a gracious Saint, one that have obtained mercy, and am thereby made merciful to others, (for ſo much the word ſignifieth) I doubt not of audience and acceptance in Heaven. God regards not the prayer, if the perſon be not right. For Witches ſome plead, that they uſe good prayers: in anſwer whereunto one ſaith well, Si magicae, Deus non vult tales: ſi piae, non per tales. God heareth not good prayers from a bad man; as that State in ſtory would not hear a good motion from an ill mouth: or, as wee cannot indure to hear ſweet words from a ſtinking breath. The bloud of a Swine might not be offered in Sacrifices, though better to look upon than the bloud of a Sheep.