Just as consonants and vowels articulate words and help singers to convey the meaning and emotion of the text, the subtle movements and pressure of the right hand on the bow add articulation that gives Baroque music its life and expression. French writers speak in general terms about the role of the right hand and stress the central importance of the bow as an expressive device:

If the Viol as played by the left hand with its ornaments is the body, one could say that the Bow is the soul, since it is the bow that animates and expresses all the passions that agree with the Voice and that mark the different tempos of the composition; that is why it is of great consequence to use the bow with certain rules, and what proves this necessity is the exactitude with which the Masters mark the bowings in their Pieces.