“In laying the foundation of a thorough education, it is necessary that all the important mental faculties be brought into exercise. It is not sufficient that one or two be cultivated while others are neglected. A costly edifice ought not to be left to rest upon a single pillar. When certain mental endowments receive a much higher culture than others, there is a distortion in the intellectual character. The mind never attains its full perfection unless its various powers are so trained as to give them the fair proportions that nature designed. If the student exercises his reasoning powers only, he will be deficient in imagination and taste, in fervid and impressive eloquence. If he confines his attention to demonstrative evidence, he will be unfitted to decide correctly in cases of probability. If he relies principally on his memory, his powers of invention will be impaired by disuse.”