"There are two types of people who will tell you that you cannot make a difference in this world: those who are afraid to try and those who are afraid you will succeed." -- Ray Goforth.
We can't say we've never met these set of people; they are in our family, our workplace and they mostly come as friends.
If you think deeper about it you would conclude that the ones who are afraid to try are pretty much harmless than the ones who are afraid that you will succeed. But in real fact, they're both harmful and till you find a way to cut them off, you will really never make a difference in the world.
Once upon a time, I was that kind of friend who was too scared to try because I feared I couldn't do it or I would fail and people would laugh. I had built and fed this raging fear inside of me and it got to a point where I would scoop off a little amount and feed my friends. I knew I was doing it all wrong when they started avoiding me. I knew it was unsuitable for my well being and my future.
I changed. You can change if you belong in either or both of these categories and you should change your friends if they are in any of these categories.