Non-rational creatures do not look before or after, but live in the animal eternity of a perpetual present; instinct is their animal grace and constant inspiration; and they are never tempted to live otherwise than in accord with their own animal dharma or immanent law. Thanks to his reasoning powers and to the instrument of reason, language, man (in his merely human condition) lives nostalgically, apprehensively and hopefully in the past and future as well as in the present; has no instincts to tell him what to do; must rely on personal cleverness, rather than inspiration from the divine Nature of Things; finds himself in a condition of chronic civil war between passion and prudence and, on a higher level of awareness and ethical sensibility, between egotism and dawning spirituality. But this wearisome condition of humanity is the indispensable prerequisite of enlightenment and deliverance. Man must live in time in order to be able to advance into eternity, no longer on the animal, but on the spiritual level; he must be conscious of himself as a separate ego in order to be able consciously to transcend separate selfhood; he must do battle with the lower self in order that he may become identified with the higher Self within him, which is akin to the divine Not-Self; and finally he must make use of his cleverness in order to pass beyond cleverness to the intellectual vision of Truth, the immediate, unitive knowledge of the divine Ground of Being.

The Perennial Philosophy by Aldous Huxley