"We do not know enough about the unknown to know that it is unknowable"

...Such dogmatism at least must be quite as impossible to anyone calling himself an agnostic as to anyone calling himself a spiritualist. You cannot take the region called the unknown and calmly say that though you know nothing about it, you know that all its gates are locked. You cannot say, "This island is not discovered yet; but I am sure that it has a wall of cliffs all round it and no harbour." That was the whole fallacy of Herbert Spencer and Huxley when they talked about the unknowable instead of the unknown. An agnostic like Huxley must concede the possibility of a gnostic like Blake. We do not know enough about the unknown to know that it is unknowable

-William Blake (1910)