Since art is a virtue of the intellect, it demands to communicate with the entire universe of the intellect. Hence it is that the normal climate of art is intelligence and knowledge: its normal soil, the civilized heritage of a consistent and integrated system of beliefs and values; its normal horizon , the infinity of human experience enlighted by the passionate insight of anguish or the intellectual virtues of a contemplative mind.
Jacques MaritainThe spiritual experience of the philosopher is the nourishing soil of philosophy; that without it there is no philosophy; and that, even so, spiritual experience does not, or must not, enter into the intelligible texture of philosophy. The pulp of the fruit must consist of nothing but the truth.
Jacques Maritain