When you meet a swordsman, draw your sword: Do not recite poetry to one who is not a poet. - Robert Greene

Mentors have their own strengths and weaknesses. The good ones allow you to develop your own style and then to leave them when the time is right. Such types can remain lifelong friends and allies. But often the opposite will occur. They grow dependent on your services and want to keep you indentured. They envy your youth and unconsciously hinder you, or become overcritical. You must be aware of this as it develops. Your goal is to get as much out of them as possible, but at a certain point you may pay a price if you stay too long and let them subvert your confidence. Your submitting to their authority is by no means unconditional, and in fact your goal all along is eventually to find your way to independence, having internalized and adapted their wisdom.

Never waste valuable time or mental peace of mind on the affairs of others - that is too high a price to pay.

The problem with all students, he said, is that they inevitably stop somewhere. They hear an idea and they hold on to it until it becomes dead; they want to flatter themselves that they know the truth. But true Zen never stops, never congeals into such truths. That is why everyone must constantly be pushed to the abyss, starting over and feeling their utter worthlessness as a student. Without suffering and doubts, the mind will come to rest on clichés and stay there, until the spirit dies as well. Not even enlightenment is enough. You must continually start over and challenge yourself.