One of the key principles of money is ‘opportunity cost.’ It means that when I buy something, I have to give up something else in return. We think we buy because we need something, but we often forget that we could buy something else instead. We rarely consider ‘opportunity cost’ when making a purchase. We do not compare other values against our needs. Buying something means giving up something else, but we often don’t realize it. When we spend money, we should also consider the ‘opportunity cost’; yet, in reality, we aren’t trained to do so. By making a purchase, we bypass the value comparison that may not offer any additional benefits. Maybe it’s because we lack knowledge, or perhaps the idea isn’t appealing. - Joseph’s “just my thoughts”
The reason pencils can be writing instruments is due to pencil lead. The material used for pencil lead is graphite. The graphite element is carbon (C), and four carbon atoms are combined. One carbon atom can have four bonds and can combine with another element. Diamond is similar to graphite, with four carbon atoms. However, diamonds have four carbon bonds that create a strong covalent bond with other carbon atoms, while graphite has only one weak bond. We can write or draw with a pencil because of this loose combination. When you apply pressure to the pencil with your finger, this weak bond in graphite breaks, leaving some of the crystals damaged. Don’t view it merely as a pencil; it’s a diamond’s cousin. The degree of consanguinity is very, very close. - Joseph’s “just my thoughts”