The Power of Discrimination (a bad translation word choice in English) better called vivek shakti in Sanskrit is absolutely important. BUT being analytical and discriminatory about evaluating ideas should not be confused with harboring a “doubting mind”!
Does that mean we believe and accept all that we hear and read? Not at all! We ofcourse need to question what we are told- but that should not simply be endless doubting. But a proper questioning, research and evaluation of findings. What we need to do is enhance our sense of perception, so we are able to gauge the truth (when we come across it) and develop our intellect, so we are able to discern the appropriate from the inappropriate without the need for incessant doubts!
Observe your thoughts to see if you question with the analytical approach of the intellect or simply question and ‘doubt’ new concepts, ideas and so on…