Principle Quotes - page 49
Man found that he was faced with the acceptance of "spiritual" forces, that is to say such forces as cannot be comprehended by the senses, particularly not by sight, and yet having undoubted, even extremely strong, effects. If we may trust to language, it was the movement of the air that provided the image of spirituality, since the spirit borrows its name from the breath of wind (animus, spiritus, Hebrew: ruach = smoke). The idea of the soul was thus born as the spiritual principle in the individual. Observation found the breath of air again in the human breath, which ceases with death; even today we talk of a dying man breathing his last. Now the realm of spirits had opened for man, and he was ready to endow everything in nature with the soul he had discovered in himself.
Sigmund Freud
This is Bruno's fundamental idea. He says: ”To recognize this unity of form and matter in all things, is what reason is striving to attain to. But in order to penetrate to this unity, in order to investigate all the secrets of Nature, we must search into the opposed and contradictory extremes of things, the maximum and the minimum” It is in these very extremes that they are intelligible, and become united in the Notion; and this union of them is infinite Nature. "To find the point of union is not the greatest matter; but to develop from, the same its very opposite, this is the real and the deepest secret of the art” It is saying much if we speak of knowing the development of the Idea as a necessity of determinations; we shall see later how Bruno proceeded to do this. He represents the original principle, which is elsewhere known as the form, under the Notion of the minimum, which is at the same time the maximum One, which at the same time is All; the universe is this One in All.
Georg Wilhelm Friedrich Hegel
The use of the intellect in the sciences whose primitive concepts as well as axioms are given by sensuous intuition is only logical, that is, by it we only subordinate cognitions to one another according to their relative universality conformably to the principle of contradiction, phenomena to more general phenomena, and consequences of pure intuition to intuitive axioms. But in pure philosophy, such as metaphysics, in which the use of the intellect in respect to principles is real, that is to say, where the primary concept of things and relations and the very axioms are given originally by the pure intellect itself, and not being intuitions do not enjoy immunity from error, the method precedes the whole science, and whatever is attempted before its precepts are thoroughly discussed and firmly established is looked upon as rashly conceived and to be rejected among vain instances of mental playfulness.
Immanuel Kant