Re: Breaking the will of the ego.
The OP touches an important subject if I understand it well.
There is no sense in bringing other influences (sports, cultural, sprititual, philosophical) to Aikido in order to improve your Aikido.
I find it hard to put to writing, but it feels like he tells to try and *not* make of model of what you think Aikido is, but simply practice in the here and now. Let go of your assumptions of where you want your Aikido to end up.
Could also be that this is how I want to interpret his words because that matches my believes and teachings of my teacher :-)