Quote from the book "The Advancement of Learning"

And if any man be laborious in reading and study, and yet idle in business and action, it groweth from some weakness of body or softness of spirit, such as Seneca speaketh of: Quidam tam sunt umbratiles, utputent in turbido esse quicquid in luce est; and not of learning: well may it be that such a point of a man's nature may make him give himself to learning, but it is not learning that breedeth any such point in his nature.