A. A. Hodge, “The Higher Life”:
A mystical tendency may well coexist with true Christianity, and with many estimable personal qualities; yet it always tends to evil. Hence its first symptom among Evangelical Christians, which is a religious sentimentalism, associated with an inveterate vagueness of ideas and indefiniteness of statement, is to be carefully shunned. No one truth is rightly held till it is clearly conceived and stated, and no single truth is adequately comprehended till it is viewed in harmonious relations to all the other truths of the system of which Christ is the centre. The very essence of truth, like light, is clearness, not vagueness; and it necessarily seeks expression through definite articulations, and not through the medium of shadowy mezzo-tints, or oscillating lines, like the sheen of watered silk.