Birds of a feather flock together. Unfortunately, when you grow, not all of your friends will be growing with you. Your friends tend to rub off on you; as such, they can pull you up or hold you back. Ask yourself: If I wasn’t already friends with them, would I want to make friends with them? Are they more like the person I want to become, or the person I used to be?
Most people think they’re going to listen to something one time and change. But the problem is that the subconscious mind doesn’t work that way. There are so many things competing for the attention of your subconscious mind. It’s only when you listen to something over and over that it manages to cut through the noise and your subconscious realizes “this is important.”