The LORD is on my side; I will not fear: what can man do unto me? I shall not die, but live, and declare the works of the LORD. – Psalm 118:6, 17

Many Reformers had been done to death: Huss, and others who preceded him, had been burnt at the stake; Luther was cheered by the firm conviction that he was perfectly safe until his work was done. In this full assurance he went bravely to meet his enemies at the Diet of Worms, and indeed, went courageously whenever duty called him. He felt that God had raised him up to declare the glorious doctrine of justification by faith, and all the other truths of what he believed to be the gospel of God; and therefore no faggots could burn him, and no sword could kill him till that work was done. Thus he bravely wrote out his belief, and set it where many eyes would see it, “I shall not die, but live, and declare the works of the Lord.” It was no idle boast; but a calm and true conclusion from his faith in God and fellowship with him. May you and I, when we are tried, be able, through faith in God, to meet trouble with the like brave thoughts and speeches! We cannot show our courage unless we have difficulties and troubles. A man cannot become a veteran soldier if he never goes to battle. No man can get his sea legs if he lives always on land. Rejoice, therefore, in your tribulations, because they give you opportunities of exhibiting a believing confidence, and thereby glorifying the name of the Most High. But take heed that you have faith, true faith in God; and do not become a puppet of impressions, much less a slave of the judgments of others. To have David’s faith, you must be as David. No man may take up a confidence of his own making: it must be a real work of the Spirit, and growth of grace within, grasping with living tendrils the promise of the living God. ~ C.H. Spurgeon

https://www.blueletterbible.org/Comm/spurgeon_charles/sermons/2237.cfm