Fancy a man seeing a certain kind of thing for the first time in his life. He can understand it, use and enjoy it, but he cannot apply a name to it, nor communicate any idea of it, even though all the while it be a mere thing of sense. How much greater will be his powerlessness when it goes beyond the senses!
 William James, The Varieties of Religious Experience (1902). copy citation

Context

“Accordingly in this knowledge, since the senses and the imagination are not employed, we get neither form nor impression, nor can we give any account or furnish any likeness, although the mysterious and sweet-tasting wisdom comes home so clearly to the inmost parts of our soul. Fancy a man seeing a certain kind of thing for the first time in his life. He can understand it, use and enjoy it, but he cannot apply a name to it, nor communicate any idea of it, even though all the while it be a mere thing of sense. How much greater will be his powerlessness when it goes beyond the senses! This is the peculiarity of the divine language. The more infused, intimate, spiritual, and supersensible it is, the more does it exceed the senses, both inner and outer, and impose silence upon them....” source