Charles H. Spurgeon on Psalms 119:92

Unless thy law had been my delights, etc. This text sets out the great benefit and comfort which David found in the law of God in the time of his affliction. It kept him from perishing: "Had not thy law been my delights, I had perished in ray affliction"...David speaks this (saith Musculus) of the distressful condition he was in when persecuted by Saul, forced to fly to the Philistines, and sometimes to hide himself in the rocks and caves of the earth. It is very likely (saith he) that he had the book of God's law with him, by the reading of which he mitigated and allayed his sorrows, and kept himself pure from communicating with the heathen in their superstitions. The Greek scholiasts say that David uttered these words when driven from Saul, and compelled to live among the Philistines, etc. For he would have been allured to have communicated with them in their impieties had he not carried about him the meditation of the word of God.

The word of God delighted in is the afflicted saint's antidote against ruin and destruction. The word of God is the sick saint's salve, the dying saint's cordial, a precious medicine to keep God's people from perishing in time of affliction. This upheld Jacob from sinking, when his brother Esau came furiously marching to destroy him (Genesis 32:12). He pleaded, "And thou saidst, I will surely do thee good, " etc. Thus the promise of God supported him. This also upheld Joshua and enabled him courageously to fight the Lord's battles, because God had said, "He would never leave him nor forsake him" (Joshua 1:5). Melanethon saith that the Landgrave of Hesse told him at Dresden that it had been impossible for him to have borne up under the manifold miseries of so long an imprisonment, Nisi habuisset consolationem verbo divino in suo corde, but for the comfort of the Scriptures in his heart. Edmund Catamy (1600-1666) in "The Godly Man's Ark."