He that receiveth a prophet in the name of a prophet shall receive a prophet’s reward; and he that receiveth a righteous man in the name of a righteous man shall receive a righteous man’s reward. – Matthew 10:41

Brethren, you have no reason to envy, though you may admire to your heart’s content, all who are diligent and successful in the service of Christ. Let me remind you of a law of the kingdom of heaven with which you are all familiar-“He that receiveth a prophet in the name of a prophet shall receive a prophet’s reward.” In truth, it is a splendid appointment to be a servant of the Lord. David thought so, for you often read at the commencement of his psalms-“A prayer of David, the servant of God,” though you never read, “A prayer of David, the king of Israel,” for he thought more of being enrolled a servant of God than of being entitled a king of Israel. Health and strength, ability and opportunity to fulfil a mission for the Master are much to be desired, but these are not always to be taken as reliable evidence of personal salvation. A man may preach admirably, and he may work marvels in the church, and yet himself not be a partaker of saving grace. Hence, when the disciples came back from preaching, and said, “Lord, even the devils are subject to us through Thy name,” the Lord said, “Never the less, in this rejoice not, but rather rejoice because your names are written in heaven.” Judas was amongst them; Judas cast out devils; Judas preached the gospel; and yet Judas was a son of perdition, and is lost for ever. Because you cannot do much you must not infer that therefore you are not saved; for if you were to be among the chief of Christian workers it would not prove that you were certainly a child of God. Do not fret, then, because you are shut out from the cheerful activities in which others share; for, as long as your name is written in heaven, and your heart truly follows after the Lord, you shall have an abundant recompense at the last great day, even though here you are doomed to be a sufferer rather than a worker. ~ C.H. Spurgeon

https://www.blueletterbible.org/Comm/spurgeon_charles/sermons/1513.cfm