I find that it's fine to have high goals, but not high expectations. There's a key difference: expectations are directly related to your satisfaction or happiness, whilst goals are only related to success.
If you
expect a study score of 10 - an apparently easy stretch - you will more easily be satisfied at your result. If you expect to get a 50, though, which is much more difficult, then you are setting yourself for disappointment. Plus, if you set a study score of 10, there's a high chance you can exceed this, whilst you can't exceed 50. So what is wanted are low expectations.
On the other hand, if you
aim for 50, you develop optimism which is both important to health and conducive to success, but if you only aim for 10 then you limit yourself with pessimism. What is wanted here, then, are high goals.
Obviously, however, there's a close relationship between these two, and to actually set a goal of 50 but harbour an expectation of 10 is quite difficult. So being reasonable is crucial. If, however, you are able to aim for 50 and expect to get 10, then well done and tell me about it
