Test advice thoroughly before keeping or discarding it

Fabrizio Rausa argues that if you are serious about changing yourself and making progress, you cannot try something once and conclude it does not work. Proper testing has two steps: first you test the source, meaning you evaluate whether the person giving the advice is credible. Then you actually test what they say, and you do it more than once. After thorough testing, you either improve on the advice or discard it because it genuinely did not fit your situation. That filtering process is the real takeaway.