Quote by Baruch (_Benedict de) Spinoza
But if men would give heed to the nature of substance they would doubt less concerning the Proposition that Existence appertains to the nature of substance: rather they would reckon it an axiom above all others, and hold it among common opinions. For then by substance they would understand that which is in itself, and through itself is conceived, or rather that whose knowledge does not depend on the knowledge of any other thing.
Summary
This quote emphasizes the importance of understanding the nature of substance. It suggests that if individuals truly grasped the essence of substance, they would no longer question the proposition that existence belongs to its nature. Instead, they would perceive this proposition as an essential and universally accepted truth. It argues that substance should be comprehended as something self-existent, self-conceived, and independent of any other knowledge. In essence, the quote highlights the significance of recognizing substance as a fundamental concept that serves as the foundation for understanding existence.