but yes, you need to come up with your own motivation, even if it's... um... unrealistic.
yes, we were told that you need to set high and challenging goals for yourself, then you will be able to achieve more... because if you dream of something more distant and strive for it, you will first think about it all, and then achieve it. If the goal is not difficult, then after reaching it, you will have to look for a new one, think about it, etc., and this can take a lot of time, so you might stay at that level.