Plato

In the Laws Plato says that the purpose of education should be to associate feelings of pleasure with what is good and feelings of pain with what is evil.

Intellectual and Moral Virtues (of Education)

William Godwin, Enquirer (1797):

The true object of education like that of every other moral process, is the generation of happiness.

Herbert Read (in The Education of Free Men (1944) questioned whether "generation" implies "a natural process which only requires encouragement, or is it a regimen enforced by special technique?"). Read - after referring to Aristotle - argues that:

The first question in education, therefore, is how best to develop the moral virtues of children, - that is to say, how best to train the physical senses with which each individual is endowed so that they mature to that state of temperance, harmony and skill which will enable the individual to pursue the intellectual virtues of freedom of will and singleness of mind.

Read goes on:

the general tradition of education in Europe and America since the Renaissance has neglected or distorted this classical theory [Aristotle's] - first by blurring the clear distinction between intellectual and moral virtue, and then by ignoring the essential priority of moral virtue, by attempting to inculcate intellectual virtue into minds which have not received the necessary preparation.

See: What is Learning?