A bullet or a pencil

They are both composed of the same element; lead. But, with the use of first one you can destroy a nation. On the other hand, by using the other one, you can tell a boy a narration. With a bullet, instead of killing innocent people you can use it the other way around like bird hunting, or even practicing shooting sport.
In the case of a pencil it can also have two sides: good and bad. You might be asking how ? Well, when a person expresses his/her feelings by offending another person’s point of view in a newspaper article for example, this becomes harmful. But, when you flip the coin you can do lots of good things like by using a pencil like: learning, teaching, book writing, drawing, calculating an equation, etc.
So, lead can make a leader out of it or can make a bad creature.