Rejoice in the Lord always. Again I will say, rejoice!
Let your gentleness be known to all men. The Lord is at hand.
Be anxious for nothing, but in everything by prayer and supplication, with thanksgiving, let your requests be made known to God; and the peace of God, which surpasses all understanding, will guard your hearts and minds through Christ Jesus.

Philippians 4:4-9

Begin to rejoice in the Lord, and your bones will flourish like an herb, and your cheeks will glow with the bloom of health and freshness. Worry, fear, distrust, care-all are poisonous! Joy is balm and healing, and if you will but rejoice, God will give power.
— A. B. Simpson

To rejoice in temporal comforts is dangerous, to rejoice in self is foolish, to rejoice in sin is fatal, but to rejoice in God is heavenly.”
― Charles H. Spurgeon

 The mere fact itself that God’s will is irresistible and irreversible fills me with fear, but once I realize that God wills only that which is good, my heart is made to rejoice.

— A. W. Pink

The joy of the Lord will arm us against the assaults of our spiritual enemies and put our mouths out of taste for those pleasures with which the tempter baits his hooks.

— Matthew Henry

Let not a libation of tears be the only offering at the shrine of Jesus; let us also rejoice with joy unspeakable. If we have need to lament our sin, how much more to rejoice at our pardon!
— Charles H. Spurgeon

How divinely full of glory and pleasure shall that hour be when all the millions of mankind that have been redeemed by the blood of the Lamb of God shall meet together and stand around Him, with every tongue and every heart full of joy and praise! How astonishing will be the glory and the joy of that day when all the saints shall join together in one common song of gratitude and love, and of everlasting thankfulness to this Redeemer! With that unknown delight, and inexpressible satisfaction, shall all that are saved from the ruins of sin and hell address the Lamb that was slain, and rejoice in His presence!

— Isaac Watts