Yes it is true. I follow several that have documented their whole journey and still do. One thing that my mentor has said over and over again is "if you surround yourself with 5 millionaires, you will be the 6th." I am sure we all know how important it is to surround yourself with the right people. People that encourage you and bring you up and not cut you down.
Another thing is mind set. You have to believe you can do it. One thing I have learned is to be careful of who you tell your dreams to. The people closest to you (friends and family) WILL BE the first to get in your face and tell you that it is impossible. I think the reason they do this is because they don't have the courage to go after their dreams. It is sad, but very few people ever do.
You also have to jump (as Steve Harvey says). You have to take that leap of faith and just do it. It is very scary but you will not achieve your dreams by staying in your comfort zone. As I have read (don't remember where so I can reference it) "success is on the other side of fear."
If you haven't seen Steve Harvey talk about jumping, here is 2 videos. The first one is short - 2 minutes and the second one he didn't realize the cameras where still on, it is really good but it is 6 min long. If you have the time, watch it.
Steve Harvey short video
Steve Harvey long video