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If you have a restless intellect, it is very likely that you have played atsome point with the idea of investigating the meaning and conceptualfoundations of quantum mechanics. It is also probable (albeit not certain) thatyour intentions have been stopped on their tracks by an encounter with someversion of the "Shut up and calculate" command. You may have heard thateverything is already understood. That understanding is not your job. Or, if itis, it is either impossible or very difficult. Maybe somebody explained to youthat physics is concerned with "hows" and not with "whys"; that whys are thebusiness of "philosophy" ---you know, that dirty word. That what you call"understanding" is just being Newtonian; which of course you cannot ask quantummechanics to be. Perhaps they also added some norms: The important thing atheory must do is predict; a theory must only talk about measurable quantities.It may also be the case that you almost asked "OK, and why is that?", but youfinally bit your tongue. If you persisted in your intentions and the debate gota little heated up, it is even possible that it was suggested that you sufferedof some type of moral or epistemic weakness that tend to disappear as you growup. Maybe you received some job advice such as "Don't work in that if you everwant to own a house".  I have certainly met all these objections in my short career, and I thinkthat they are all just wrong. In this somewhat personal document, I try todefend that making sense of quantum mechanics is an exciting, challenging,important and open scientific endeavor. I do this by compulsively quotingFeynman (and others), and I provide some arguments that you might want to usethe next time you confront the mentioned "opinions". By analogy with theanti-rationalistic Copenhagen command, all the arguments are subsumed in astandard answer to it: "Shut up and let me think"

Shut up and let me think. Or why you should work on the foundations of quantum mechanics as much as you please