From the simplest standpoint I can muster: (jmho)
Knowledge of Good and Evil=The Law
Partaking of tree of life=Partaking of the things of which there is no law against; love, kindness, compassion, empathetic joy, even-mindedness, patience, self-control. (etc)
How far you want to grow these trees is up to you, imo.
You have a similar experience with these terms as I - from the looks of things...
for the sake of conversation I would like to ask your opinion of these ideas.... as you know, in these types of things there is much room for interpretation, and i like to explore as many ideas as possible...
I do not see a struggle between Good and Evil...
I see personal choice, and eternity to experiment.
Though of course there are the concepts of constructive and destructive energies - which is what folks are normally trying to wiggle around to fit their idea of Good and Evil...
but those concepts are simple Law, as I see it - and set up so that the system works... and is exactly what we are learning here in this particular school - to manage subtle energies to the point of understanding and competency...
Partaking of the Tree of Life only happens when the consciousness seeks the connection it has with the divine - and makes a connection - purposefully.
"Partaking" in what you are referring to - in my personal opinion - is simply a gift from our Father to us - no effort required... with the exception of the last item on your list - self control. That is the end result of the repetition which Karma puts all souls through... when that repetition is no longer needed, and the soul wakes and starts thinking: "this is too familiar - I have done this before", and makes the effort to make a connection with the divine - The tree is traversed, and the soul is free to experience Higher Spheres. The veil is rent and the soul starts receiving the memories of countless incarnations.
So, in my opinion, one is not "growing" a tree, they are providing it light, and nourishment, so that it might blossom... but until that choice is made, the tree sits with no leaves, hibernating...