Reason in man is rather like God in the world.

Man is a thinking being. His reason enables him to recognize his own potentialities and those of his world. He is thus not at the mercy of the facts that surround him, but is capable of subjecting them to a higher standard, that of reason. P. 6

A man is rational in proportion as his intelligence informs and controls his desires.

Reason is God's crowning gift to a man...

Man is free, but his freedom ceases when he has no faith in it; and the greater power he ascribes to faith, the more he deprives himself of that power which God has given to him when He endowed him with the gift of reason. Reason is a particle of the Creator's divinity. When we use it with a spirit of humility and justice we are certain to please the Giver of that precious gift.

Reason leads man back to his instincts.

It has been said that man is a rational animal; while this formulation is insufficient and ill-sounding, it nonetheless points to an undeniable truth, though in an elliptical fashion, for the rational faculty actually serves to underscore the transcendence of man in relation to the animal. Man is rational because he possesses the Intellect, which by definition has a capacity for the absolute and therefore a sense of the relative; and he possesses the Intellect because he is made "in the image of God", which, moreover, he demonstrates physically by his corporeal form and his cranial form, as well as by his vertical posture, then by language and his productive capacity. Man is a theophany in his form as much as in his faculties.

Reason in a creature is a faculty of widening the rules and purposes of the use of all its powers far beyond natural instinct; it acknowledges no limits to its projects. Reason itself does not work instinctively, but requires trial, practice, and instruction in order gradually to progress from one level of insight to another. Therefore a single man would have to live excessively long in order to learn to make full use of all his natural capacities. Since Nature has set only a short period for his life, she needs a perhaps unreckonable series of generations, each of which passes its own enlightenment to its successor in order finally to bring the seeds of enlightenment to that degree of development in our race which is completely suitable to Nature’s purpose. This point of time must be, at least as an ideal, the goal of man’s efforts, for otherwise his natural capacities would have to be counted as for the most part vain and aimless. This would destroy all practical principles, and Nature, whose wisdom must serve as the fundamental principle in judging all her other offspring, would thereby make man alone a contemptible plaything.

govern his actions according to the dictates of the law of reason which God had implanted in him.

Man is not just another animal. Our species possesses something unique, a privilege that distinguishes us from all other life forms: Reason.

Every man's Reason is sufficient for his guidance, if used.

Reason tends to check selfish impulses and to grant the satisfaction of legitimate impulses in others.

Of all animals man only is endowed with reason, properly so called, so he only hath a will, and is capable of virtue and vice, rewards and punishments. Yet something bearing a resemblance to each of these, may also be found in brutes, especially such as are more perfect, and more capable of discipline. For there is in them a certain faculty that answers to reason, called by some an inferior degree of reason, whereby they not only consider in a manner what is pleasant and profitable, and search for the means of attaining them; but they likewise acknowledge a certain manner of living suitable to their nature prescribed to them by God, which has some affinity to virtue.

Man is conscious of a universal soul within or behind his individual life, wherein, as in a firmament, the natures of Justice, Truth, Love, Freedom, arise and shine. This universal soul, he calls Reason: it is not mine, or thine, or his, but we are its; we are its property and men. And the blue sky in which the private earth is buried, the sky with its eternal calm, and full of everlasting orbs, is the type of Reason. That which, intellectually considered, we call Reason, considered in relation to nature, we call Spirit. Spirit is the Creator. Spirit hath life in itself. And man in all ages and countries, embodies it in his language, as the FATHER.