" Fire is nothing, yet it can break things down to make them into another material. It can break things down into their most simple element. The element of fire is what all things are born from, and all things end up returning to fire. The main substance of reality, fire, is almost a contradictory aspect of nature in the fact that it can be the source of things, yet at the same time it can destroy these things. .
Heraclitus finds that fire is equivalent to a God. This God of his, fire, lives in everything and everyone. When people are alive they have a fire within them thriving until the day that they die and their fire goes out. Fire gives our lives structure and a conscious mind to live our lives. All things are based on this fire and allow our world to be. Fire gives us the basis for all structures. These structures are the foundation for our lives and our reality. Reality is made of the substances struggling against each other, but there struggling together is what makes our reality. Heraclitus feels that reality is purely change, it is something that is in constant motion and it never stops for anything.
Heraclitus' student says that "you can't step into the same river once." The idea behind this is based around the fact that things are forever changing at every single moment in time. If things are constantly changing, then there is not a way that you could be stepping in the same river once. The river is constantly flowing, it is not standing still so by the time you step down into that river with each passing second upon second the water that your foot is in, is different. Thus there is not even a way to step into the sane river even once. .
2. Hume makes a distinction between "relations of ideas" and "matters of fact." Relations of ideas are the means in which an idea can be justifiably mixed and matched. Hume uses logic and mathematics as examples of relations of ideas.
