Encountering a Mentor from your past or present in your dreams often heralds a quest for wisdom, counsel, or understanding. It signals a pivotal moment of transition in your life, suggesting you're stepping onto a new journey, equipped with lessons from the past. Reflect on your interactions and learnings from that specific teacher—was there a particular subject they imparted? On another note, seeing a teacher might also delve into themes of authority and the quest for validation.