Why does Chapter 11 argue that a devotee with a body needs a Guru who is also in a physical form?

Chapter 11 presents a specific spiritual argument for this necessity, stating it as a 'determination of the scriptures.' The text posits that as long as the worshipper has a form (a physical body), the Guru must also be in a physical, manifest form for devotion to be effective. The underlying principle is that 'for the formless, the formless is suitable.' According to Chapter 11, meditating on the Saguna (manifest) form is the very mechanism through which devotion arises. Without this, the 'bud of the mind' cannot open, and if it doesn't bloom, it will lack the fragrance and nectar that attract spiritual realization, just as a flower without nectar cannot attract a bee.