Of the Teaching of the Law, and How to Do It

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1. Jurisprudence is the knowledge of things divine and human, the science of the just and the unjust.

2. Having laid down these general definitions, and our object being the exposition of the law …, we think that the most advantageous plan will be to commence with an easy and simple path, and then to proceed to details with a most careful and scrupulous exactness of interpretation. Otherwise, if we begin by burdening the student's memory, as yet weak and untrained, with a multitude and variety of matters, one of two things will happen: either we shall cause him wholly to desert the study of law, or else we shall bring him at last, after great labour, and often, too, distrustful of his own powers (the commonest cause, among the young, of ill-success), to a point which he might have reached earlier, without such labour and confident in himself, had he been led along a smoother path.

Institutes of Justinian, §§ 1-2 (533 A.D.) (from the translation by J.B. Moyle, 5th ed. 1913 A.D.).

I didn't see anything in there about tuition, but I didn't read it all.