In 1665, Isaac Newton invented calculus. In 1727, he died a virgin. Now it's your turn.
Don't worry; the path is well-paved. Since Newton, other mathematicians have distilled the invention calculus into an area of study called real analysis.
This may sound like serious business. It's not.
Analysis deals a lot with infinity and its associated funny business.
Fortunately, you don't have to be a genius who can see into the fourth dimension to understand infinity. Instead, we explore infinity the same way a 4 year old does: by asking annoying questions.
For example, if your little brother asks whether gets smaller than this 🤏 you can always throw a big n at him and win. That's how we know it gets infinitely small.