There are a few things you can do to foster that ability. Try to visualise a picture of the person that you want to be, then come up with a series of steps that you can action in order to get there. The steps are the important part. You can say, ‘I’m going to become that person,’ but there’s going to be a hell of a lot of time before that happens.
You need realistic stepping stones along that journey. Nobody is perfect, and that progression isn’t going to be linear. But if you’ve got that overarching view of where you want to end up, and a plan to get there, then you can keep striving for the result.