The latter was the eternal, living principle or soul in him; and in sleep, being for the time dissociated from the characterizing mind, which at other times employed it for its outer vehicle or agent, it spontaneously sought escape from the scorching contiguity of the frantic thing, of which, for the time, it was no longer an integral.
You might almost say, that this strange uncompromisedness in him involved a sort of unintelligence; for in his numerous trades, he did not seem to work so much by reason or by instinct, or simply because he had been tutored to it, or by any intermixture of all these, even or uneven; but merely by a kind of deaf and dumb, spontaneous literal process.
There are no more uses of "spontaneous" in the book.
Show samples from other sources
The group broke into spontaneous laughter.
He bubbled with enthusiasms, and his faintest smile or lightest laugh seemed spontaneous and genuine.