Radical reflection means no reflection at all but rather perception. In this particular case, it is the perception of thoughts, unveiling their true nature as transient and without substance. It might be the only way not to get yoked by them but, on the contrary, to yoke them to the pole of awareness. I had a taste of this during mindfulness practice only to fall afterwards to identifying with them and letting them direct me in life. May these auspicious moments multiply for me and all. It is quite liberating.