From the book, Reflections, by Herman Hesse
"Spirit and soul, intellect and feeling are inseparable and interdependent; anyone who overestimates and overcultivates one at the expense of the other, or worse, in conflict with the other, is aiming at the half rather than the whole.
It is amusing to note that the pure intellectual, for all the aptness and acuteness of his judgments, soon grows tiresome. And the lofty enthusiasts of feeling, the poetic specialists of the heart soon grow equally tiresome. A nobel intellect that relies on itself alone and feeling reduced to its own resources both lack a dimension. We see this in daily life and in politics; in art it is still more evident."