Matthew 9:11–12 (CJB): When the P’rushim saw this, they said to his talmidim, “Why does your rabbi eat with tax-collectors and sinners?”
12 But Yeshua heard the question and answered, “The ones who need a doctor aren’t the healthy but the sick.“
The religious leaders at the time of Yeshua objected to his association with certain classes of people. They asked his talmidim (disciples) about him eating with sinners and tax collectors. These guys were snubbed by the religious leaders (Pharasees).
Yeshua, taught them his divine medicine lessons. In the physical realm only sick need a doctor, similarly in the spiritual realm the spiritually sick need a spiritual doctor, this is what he taught them.
The take home message is that those who have physical ailments need worldy doctor. The spiritually sick people would need a spiritual doctor.
Who could be their spiritual doctor?