Check this out! To the untrained eye, this looks like a crayon...
...but it's really an eraser.
I need erasers a lot because I'm still learning a lot of things and sometimes I make mistakes. And mistakes are one instance when erasers come in handy. Erasers help us to start over when we've made mistakes.
Despite what you may feel at times, there is no mark that is so permanent that it cannot be undone. It's true that you may have to do some serious scrubbing or involve powerful cleaning agents. Sometimes an unwanted mark is so deep that all you can do is paint over the affected area and create something new. But, with the right tools, there is no mark that cannot be undone.
So maybe that's why I like this eraser so much--it's a reminder that we can erase small mistakes, but serious mistakes require serious help to be written over. We're all learning.