You ask for healing, strength, and peace for your son. Hear then what true peace is, for the peace of this world is often a false truce, a calm that hides the disease within. Our Lord Himself declared, "I came not to send peace, but a sword." He did not come to lull the soul into a comfortable sleep while sin festers, but to sever the rotten limb, to cut away the mutinous passion, so that true health may take root. If your son's body or mind is afflicted, consider first his spirit. For what gain is there if his flesh recovers while his soul remains bound to the rebellion of this age? Grant that his physical and mental anguish may be the very sword that drives him to the true Physician.
Do not seek peace as the world gives, a peace that papers over the war between man and God. The peace Christ gives is born from grace, and grace flows only to those who take up their cross. If your son has wandered into agreements with the world's lies, if he has made peace with what God calls sin, then his true healing begins when that false concord is shattered. Better a good discord that leads to life than a wicked harmony that ends in destruction. Pray, then, not merely for his comfort, but for his full repentance and restoration to the commandments of the Lord. For Christ said, "He that heareth not these sayings dost not love Me," and without that love, there is no lasting peace.
You mention strength. What kind of strength do you desire for him? The strength that comes from hearing and keeping the word of God? Then ask that he be given ears to hear. How many have heard ten times and seemed unmoved, yet afterward, by one more word, were struck down and converted? Do not despair if you see little fruit now. The root may be drinking in the remedy unseen. Continue to bring his soul before God through prayer and the teaching of the apostles, avoiding the amulets and devices of this world, for what mother would trade her child's soul for bodily health? She who refuses every false hope, entrusting her child entirely to the Cross, has already offered a living sacrifice. That very act of faith is counted to her as martyrdom.
Therefore, seek first the kingdom of God and its righteousness for your son. Beg the Father of mercies to give him the grace that chases away the demons of despair and the warring thoughts, to send His angel of peace, not the peace of earthly ease, but the peace that reconciles heaven and earth. When his heart is set right with God, his mind will find rest, and his body may, if it pleases the Lord, be renewed as a testament to that inward healing. But place no conditions on God. Entrust your son to the One who knows whether it is better for him to be healed or to carry a thorn that saves his soul. For in all things, the only abiding peace is to stand within the will of Christ, whose word is not His own but the Father's, and whose love is measured by our obedience.