Institutio Oratoria
Quintilian
Quintilian. Institutio Oratoria, Volume 1-4. Butler, Harold Edgeworth, translator. Cambridge, Mass; London: Harvard University Press, William Heinemann Ltd., 1920-1922.
This phenomenon is familiar to farmers, who hold that the pruning-hook should not be applied while the leaves are yet young, for they seem to
shrink from the steel[*](cp. Verg. G. ii. 369, ante reformidat ferrum. ) and to be unable as yet to endure a scar.
The instructor therefore should be as kindly as possible at this stage; remedies, which are harsh by nature, must be applied with a gentle hand: some portions of the work must be praised, others tolerated and others altered: the reason for the alterations should however be given, and in some cases the master will illumine an obscure passage by inserting something of his own.
v1-3 p.231
Occasionally again the teacher will find it useful to dictate whole themes himself that the boy may imitate them and for the time being love them as if they were his own.