What leads to the cause of people giving up on their dreams??

Typically, most people fail to accomplish their dreams. Not because they can't, but because they choose not to. Anybody could do anything they wanted if they were to set their mind to it. Usually people don't reach their dreams because they failed. Though, they don't realize failing is just a step closer to where they want to be. If they give up because they fail, it wont help them get where they need to be. On top of that, stress could be a huge factor as to why certain people haven't reached their dreams. Other than the stress and failure, the lack of motivation is also a main reason people don't succeed, or maybe it's because they have no desire to succeed. For example, if you have no motivation to accomplish what you want to do, how are you going to do it? You're not. These are a few of many reasons people don't follow their dreams,or even reach them for that matter.