This is why we have made available S. Gordeevtseva's essay "Touching a Mystery" about rules of articulation in J.S. Bach's clavier music in English and in Russian for free downloads on my website.
As an illustration, here is the video of a 6 y old student tackling J.S. Bach Little Prelude in C Minor, in style after working on it for about a month. When not distracted... his playing shows clarity of texture and rhythmic accuracy that reveal the Minuet like nature of the piece; even some stars could benefit from this foundation!