The most dangerous man in the world is the contemplative who is guided by nobody. He trusts his own visions. He obeys the attractions of an interior voice but will not listen to other men. He identifies the will of God with anything that makes him feel, within his own heart, a big, warm, sweet interior glow. The sweeter and the warmer the feeling is, the more he is convinced of his own infallibility.

Seeds of contemplation (ed. 1962)