Rejoice in the Lord alway: and again I say, Rejoice. – Philippians 4:4

And not only so, but we also joy in God through our Lord Jesus Christ, by whom we have now received the atonement. – Romans 5:11

What a gracious God we serve, who makes delight to be a duty, and who commands us to rejoice! Should we not at once be obedient to such a command as this? It is intended that we should be happy. That is the meaning of the precept, that we should be cheerful; more than that, that we should be thankful; more than that, that we should rejoice. I think this word “rejoice” is almost a French word; it is not only joy, but it is joy over again, re-joice. You know re usually signifies the reduplication of a thing, the taking it over again. We are to joy, and then we are to re-joy. We are to chew the cud of delight; we are to roll the dainty morsel under our tongue till we get the very essence out of it. “Rejoice.” Joy is a delightful thing. You cannot be too happy, brother. Nay, do not suspect yourself of being wrong because you are full of delight. You know it is said of the divine wisdom, “Her ways are ways of pleasantness, and all her paths are peace.” Provided that it is joy in the Lord, you cannot have too much of it. The fly is drowned in the honey, or the sweet syrup into which he plunges himself; but this heavenly syrup of delight will not drown your soul, or intoxicate your heart. It will do you good, and not evil, all the days of your life. God never commanded us to do a thing that would really harm us; and when He bids us rejoice, we may be sure that this is a delightful as it is safe, and as safe as it is delightful. Come, brothers and sisters, I am inviting you now to no distasteful duty when, in the name of my Master, I say to you, as Paul said to the Philippians under the teaching of the Holy Spirit, “Rejoice in the Lord alway: and again I say, Rejoice.” ~ C.H. Spurgeon

https://www.blueletterbible.org/Comm/spurgeon_charles/sermons/2405.cfm