“My times are in Thy hand.” – Psalm 31:15.

David was sad: his life was spent with grief, and his years with sighing. His sorrow had wasted his strength, and even his bones were consumed within him. Cruel enemies pursued him with malicious craft, even seeking his life. At such a time he used the best resource for grief; for he says in verse 14, “But I trusted in Thee, O Lord.” He had no other refuge but that which he found through faith in the Lord his God. If enemies slandered him, he did not render railing for railing; if they devised to take away his life, he did not meet violence with violence; but he calmly trusted in the Lord. They ran hither and thither, using all kinds of nets and traps to make the man of God their victim; but he met all their inventions with the one simple defense of trust in God. Many are the fiery darts of the wicked one; but our shield is one. The shield of faith not only quenches fiery darts, but it breaks arrows of steel. Though the javelins of the foe were dipped in the venom of hell, yet our one shield of faith would hold us harmless, casting them off from us. Thus David had the grand resource of faith in the hour of danger. Note well that he uttered a glorious claim, the greatest claim that man has ever made: “I said, Thou art my God.” He that can say, “This kingdom is mine,” makes a royal claim; he that can say, “This mountain of silver is mine,” makes a wealthy claim; but he that can say to the Lord, “Thou art my God,” hath said more than all monarchs and millionaires can reach. If this God is your God by His gift of Himself to you, what can you have more? If Jehovah has been made your own by an act of appropriating faith, what more can be conceived of? You have not the world, but you have the Maker of the world; and that is far more. There is no measuring the greatness of his treasure who hath God to be his all in all.~ C.H. Spurgeon

https://www.blueletterbible.org/Comm/spurgeon_charles/sermons/2205.cfm