Have mercy on me, O Lord, for I have cried to thee all the day.

“Therefore, the Word is our educator who heals the unnatural passions of our soul with his counsel. The art of healing, strictly speaking, is the relief of the ills of the body, an art learned through human wisdom. Yet, the only true divine healer of human sickness, the holy comforter of the soul when it is ill, is the Word of the Father. Scripture says, "Save your servant, O my God, who puts his trust in you. Have mercy on me, O Lord, because I have cried to you the whole day through." In the words of Democritus, "The healer, by his art, cures the body of its diseases, but it is wisdom that rids the spirit of its ills." The good educator of little ones, however, Wisdom, the Word of the Father, who created human beings, concerns himself with the whole creation, and as the physician of the whole person heals both body and soul.”

“"Be merciful unto me, O Lord, for I have cried unto You all day" [Psalm 86:3]. Not "one day:" understand "all day" to mean continually: from the time that the body of Christ groans being in afflictions, until the end of the world, when afflictions pass away, that man groans and calls upon God: and each one of us after his measure has his part in that cry in the whole body. You have cried in your days, and your days have passed away: another has come after you, and cried in his days: and thou here, he there, another elsewhere: the body of Christ cries all the day, its members departing and succeeding one another. One Man it is that reaches to the end of the world: the same members of Christ cry, and some members already rest in Him, some still cry, some when we shall be at rest will cry, and after them others will cry. It is the whole body of Christ whose voice He hears, saying, "Unto You have I cried all the day." Our Head on the right hand of the Father intercedes for us: some members He recovers, others He scourges, others He cleanses, others He comforts, others He is creating, others calling, others recalling, others correcting, others restoring.”

“Be merciful unto me, O Lord,.... In my distressed and miserable condition, being an object of mercy, pity, and compassion; this petition is used by Christ in Psa 41:10. for I cry unto thee daily; or "all the day"; every day, and several times in a day, Psa 55:17 constant and importunate prayer is the duty of saints, and available with God, Th1 5:17. Christ was much in the exercise of it, Luk 6:12.”