Professor Shellenberger explains the meaning of Adagio in the Baroque period at the beginning of the piece, as well as talks about Bach's ornamentation. Sometimes, the ornamentation refers to the bass line and it is the way to play more 'espressivo'. Schellenberger insists on the expression of every ornament and how they are written on the score, which determines the way of playing. Rhythm is also important to give the correct character of the improvising designs.
The ornamentation before the cadenza should be lighter to give later more importance to the cadenza. It is necessary to feel the vibration more than the note. One final recommendation to the student is to play without stress, but playfully as in the Baroque period.