Be glad in the LORD, and rejoice… – Psalm 32:11

We read in Scripture that children are to obey their parents “in the Lord.” We read of men and women being married “only in the Lord.” Now, dear friends, no child of God must go outside that ring, “in the Lord.” There is where you are, where you ought to be, where you must be. You cannot truly rejoice if you get outside that ring; therefore, see that you do nothing which you cannot do “in the Lord.” Mind that you seek no joy which is not joy in the Lord; if you go after the poisonous sweets of this world, woe be to you. Never rejoice in that which is sinful, for all such rejoicing is evil. Flee from it; it can do you no good. That joy which you cannot share with God is not a right joy for you. No; “in the Lord” is the sphere of your joy.

Rejoice in the Father, your Father who is in heaven, your loving, tender, unchangeable God. Rejoice, too, in the Son, your Redeemer, your Brother, the Husband of your soul, your Prophet, Priest, and King. Rejoice also in the Holy Ghost, your Quickener, your Comforter, in Him who shall abide with you for ever. Rejoice in the one God of Abraham, of Isaac, and of Jacob; in Him delight yourselves, as it is written, “Delight thyself also in the Lord; and He shall give thee the desires of thine heart.” We cannot have too much of this joy in the Lord, for the great Jehovah is our exceeding joy. Or if, by “the Lord” is meant the Lord Jesus, then let me invite, persuade, command you to delight in the Lord Jesus, incarnate in your flesh, dead for your sins, risen for your justification, gone into the glory claiming victory for you, sitting at the right hand of God interceding for you, reigning over all worlds on your behalf, and soon to come to take you up into His glory that you may be with Him for ever. Rejoice in the Lord Jesus. This is a sea of delight; blessed are they that dive into its utmost depths. ~ C.H. Spurgeon

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