At one level I relate to this and at another I don't. There is a message here which appears spiritual and healthy but which is actually neither wise, nor sensible and is potentially destructive.
The trouble with black and white, good and evil, is that it splits us up and splits the world. All is polarity and as Khalil Gibran says so wisely about Joy and Sorrow:
Some of you say, "Joy is greater than sorrow," and others say, "Nay, sorrow is the greater."
But I say unto you, they are inseparable.
Together they come, and when one sits, alone with you at your board, remember that the other is asleep upon your bed.
So too anger, jealousy, greed, resentment, lies, inferiority and ego are part of opposites and will always be 'asleep in the bed' even as joy, peace, love, hope, humility, kindness, empathy are awake.
It is in being human that we experience all of these feelings and emotions and learn all that we may be. It is only when we divide things up as good or evil that we create a 'wolf' which must win while the other loses.
Anger does not have to be bad or destructive; jealousy can be something which reveals how much we care and wisely used will teach us that; greed can reveal our neediness, which, if ignored will push us to excess; resentment can reveal our woundedness and desire to succeed; lies our capacity for honesty; inferiority our capacity for superiority of body, mind or spirit and what has been damaged in us and ego at its best is our companion, guide, teacher and sometimes saviour in this material world.
Just as night and day are not better than each other; just as summer and winter are opposites but not good or evil; so too is everything we experience part of a continuum and a polarity which, when honoured and embraced, create wholeness.
There is only one 'wolf' and if we do not 'feed' - honour, respect and love - all that it is, it will feed on us. We live in a world of polarity but we have a choice not to divide it into good and bad but to seek the heiros gamos - the sacred marriage - to unite all of the opposites in Love, and to respect that they can live their own polarities.
We will never and can never be only those things which we define as good for if we seek to be, we will simply send the other 'wolves' into the shadow which will feed itself and spring forth to feed on us and others when it chooses. That which we call Evil lives in that which we call Good and vice-versa; in every gift there is a curse and in every curse there is a gift.
That which we would 'starve to death' does not die, it simply takes shelter and finds other ways to 'feed' itself of which we will remain unconscious. Surely if we care for and nourish (for that is feeding) for all that we are, we create one healthy, balanced being; one healthy, loved, accepted 'Wolf.'
We do not and cannot offer literal 'food' to a child, adult, animal, organism or plant on the condition that only those 'parts' of which we approve can receive nourishment and likewise, we cannot offer emotional, psychological or spiritual 'food' or nourishment only to those parts of Self of which we approve. If we are to be whole then everything must be offered nourishment and love.