From Ray Ortlund:
“A Christianity which does not make you happy is not worthy of the name. But as long as you are just moral you will never be happy; you will never know the joy of the Holy Spirit. But the kingdom of God, the faith of the New Testament, is vibrant with joy. Look at the people on the day of Pentecost. ... They were elated, exalting and triumphant.; they were glorying in Him. That is Christianity.” ~ Martyn Lloyd-Jones, The Kingdom of God (Wheaton, 1992), page 83.