"In spite of beginning late to exercise my judicial faculty, I never found that it had lost its vigour, and when I came to publish my own ideas, I was hardly accused of being a servile disciple."[96] To that fairly credible account of the matter, one can only say that this mutually exclusive way of learning the thoughts of others, and developing thoughts of your own, is for an adult probably the most mischievous, where it is not the most impotent, fashion in which intellectual exercise can well be taken.

It is exactly the use of the judicial faculty, criticising, comparing, and defining, which is indispensable in order that a student should not only effectually assimilate the ideas of a writer, but even know what those ideas come to and how much they are worth.

And so when he works at ideas of his own, a judicial faculty which has been kept studiously slumbering for some years, is not likely to revive in full strength without any preliminary training.

Rousseau was a man of singular genius, and he set an extraordinary mark on Europe, but this mark would have been very different if he had ever mastered any one system of thought, or if he had ever fully grasped what systematic thinking means.

Instead of this, his debt to the men whom he read was a debt of piecemeal, and his obligation an obligation for fragments; and this is perhaps the worst way of acquiring an intellectual lineage, for it leaves out the vital continuity of temper and method.