from Reflections on the Psalms C.S. Lewis pp.96-97

… “We are not riders but pupils in the riding school; for most of us the falls and bruises, the aching muscles and the severity of the exercise, far outweigh those few moments in which we were, to our own astonishment, actually galloping without terror and without disaster. To see what the doctrine really means, we must suppose ourselves to be in perfect love with God–drunk with, drowned in, dissolved by, that delight which, far from remaining pent up within ourselves as incommunicable, hence hardly tolerable, bliss, flows out from  us incessantly again in effortless and  perfect expression, our joy no more separable from the praise in which it liberates and utters itself than the brightness a mirror receives is separable from the brightness it sheds. The Scotch catechism says man’s chief end is “to glorify God and enjoy Him forever”. But we shall then know that these are the same thing. Fully to enjoy is to glorify. In commanding us to glorify Him, God is inviting us to enjoy Him.”