In life," as the great Pascal observes, "we always believe that we are seeking repose, while, in reality, all that we ever seek is agitation. - Sir William Hamilton, 9th Baronet

On this ground I would rest one of the pre-eminent utilities of mental philosophy. That it comprehends all the sublimest objects of our theoretical and moral interest; that every (natural) conclusion concerning God, the soul, the present worth and the future destiny of man, is exclusively deduced from the philosophy of mind, will be at once admitted.

[T]he paramount end of liberal study is the development of the student’s mind, and... knowledge is principally useful as a mean of determining the faculties to that exercise, through which this development is accomplished... the main duty of a Professor to consist not simply in communicating information, but in doing this in such a manner... that the information he conveys may be the occasion of awakening his pupils to a vigorous and varied exertion of their faculties.

The one condition under which all powers, and consequently the intellectual faculties, are developed, is exercise.