John Piper said this quote
“ The pursuit of joy in God is not optional. It is not an “extra” that a person might grow into after he comes to faith. It is not simply a way to “enhance” your walk with the Lord. Until your heart has hit upon this pursuit, your “faith” cannot please God. It is not saving faith. Saving faith is the confidence that if you sell all you have and forsake all sinful pleasures, the hidden treasure of holy joy will satisfy your deepest desires. Saving faith is the heartfelt conviction not only that Christ is reliable, but also that He is desirable. It is the confidence that He will come through with His promises and that what He promises is more to be desired than all the world. ”