Charles H. Spurgeon on Psalms 57:7

My heart is fixed, O God, etc. The psalmist knowing that it is the order and work of God, first to prepare the heart for communion, and then to incline his own ear to hear his people, and to entertain communion with them in ordinances, he doth observe this order, and follow it with a practice suitable to it in his daily address to God, that is thus, wheresoever he doth find his heart put into a fitted and prepared frame for communion with God, he doth not let it die again, and go out of frame by a slothful neglect of such a disposition of heart. No, but he immediately sets himself to duty, to worship God, and to the acts of his worship, in his ordinances, as he expresses himself in Ps 57:7; viz., thus —ybl nwkg myhla ybl nwkg, Nachon libbi Elohim, nachon libbi (there is the first; he finds his heart fitted and prepared for communion with God): "My heart, "saith he, "is fitted or prepared" (for the word nwkg nachon is the passive conjugation niphal, signifying, he is fitted or prepared, from the root nzb, chun, he fitted or prepared, in the active; and so it is rather to be rendered prepared or fitted, then "fixed, "thus ykl, libbi, my heart; nwkg, nachon, is fitted or prepared), "O God, my heart is fitted or prepared" for communion with thee. Well, what follows? He presently sets himself upon that great duty and ordinance of communion with God, in the praising of his name and singing forth those praises, as in the words immediately following in the same verse, thus: My heart is prepared, O God, my heart is prepared; therefore, hrmzaw, ashidah va-azamerah, "I will sing and give praise." William Strong, in "Communion with God," 1656.