The Virgin Mary speaks to Sister Mary of Agreda, Spain
The height of perversity opposed to the order of the Creator, is that mortals in this transitory and short life rejoice in visible things as if they were their last end, while they ought, on the contrary, to make use of creatures to gain, not to lose, the highest Good. Do thou, therefore, my dearest, be mindful of this dangerous human folly. Consider all delights and joys of the world as insanity, its laughing as sorrow, sensible enjoyment as self deceit, as the source of foolishness, which intoxicates the heart and hinders and destroys all true wisdom. Live in constant and holy fear of losing eternal life and rejoice in nothing except in the Lord until thou obtainest full possession of Him.