pencils.

the concept of a pencil is somewhat amazing if you apply it to real life. when a mistake is made, erase it. simply erase it. sometimes there are some marks still left over, and those are the memories you've made through making that mistake. but if there aren't any marks, LET IT GO. don't hold on to the past for too long. you have to take it and grow. another positive to pencils, is that if you lose your spark, your special touch, you can resharpen your point. there is always room from improvement, and personally i think too many people forget that or dismiss that idea. i encourage people to use pencils.