I lay awake last night thinking about this card (fell asleep quite quickly in the middle so I must try it again tonight!)
The more I look at the card the more I think I do not really like it much. I probably just cannot appreciate it properly. It is good thing to have a master / teacher / guru outside yourself, as well as to recognise the master within, and the idea is positive and welcome. But I find the image hard to appreciate, and in fact my idea of the perfect master / teacher / guru is the old man from the Innocence card - full of joy and wonder, having left behind the grasping neediness of our usual external world, and appearing to be without judgment of anything.
I look at the image of the Master, and sometimes I see that huge depth behind the kind eyes, and at other times I see an image of superiority, with almost a smirk. It's my perception, I know, and perhaps it is actually a good thing because it can make me really think about why I see it like that at certain times. Perhaps its guidance is as a mirror of my current perception, to encourage me to think more deeply.