He who knows only his own side of the case knows little of that. His reasons may be good, and no one may have been able to refute them. But if he is equally unable to refute the reasons on the opposite side, if he does not so much as know what they are, he has no ground for preferring either opinion… Nor is it enough that he should hear the opinions of adversaries from his own teachers, presented as they state them, and accompanied by what they offer as refutations. He must be able to hear them from persons who actually believe them…he must know them in their most plausible and persuasive form.
- John Stuart Mill
Honestly, that sounds fairly healthy. I have a weird obsession with being well informed and being able to articulate arguments from all sides (which has occasionally made me very unpopular both in real life and online) and while it’s a fine intellectual exercise, it’s probably not the most conducive to feeling great.