Anchor all learning to a mission, vision or purpose. Break it down to a specific goal or job to be achieved. People will learn faster if they have a why behind the what. Demonstrate confident humility. Walk the thin line between self-confidence and arrogance.
Confidence breeds confidence.
But the authenticity is bred from the roots of being humble. Acceptance from humility. Use dramatic listening. Listen as if you were interviewing a hero you always have wanted to talk to. The crux of mentoring is giving advice.