Thanks for your questions. Hermits are indeed known for their freedom, and this includes not only "freedom from" a lot of truly good stuff, but also "freedom for" in really significant ways. The most important and characteristically Christian form of freedom is the power to be the persons we are called to be, and hermits are free in this way especially. Human beings are themselves free when and to whatever extent they are in a heart-level dialogue with God. This means allowing God to call us to wholeness, to humanness, and learning and being empowered to love ourselves and one another in light of that. It also means putting God (Love-in-act) at the center of our lives and allowing all else to fall into place in light of that theocentric way of relating to reality.
Everything is relativized in light of one's life with God, but this does not mean the hermit is free to forget or neglect "everything else" as one focuses on God. Instead, because life in dialogue with God (and here I mean the really deep dialogue that comes from posing the profound questions of being and meaning we each are and listening to or receiving the response that God is) represents freedom from the false self and the freedom of the true self, the hermit comes to know and love all of reality in God, in the truth. We reject enmeshment in the distorted reality c 603 calls "the world" with all that fosters regarding the false self, and we embrace authentic engagement, that is, we love the truth of all reality in God.This is the way Christ loved everything, the way empowered by the Holy Spirit, the way that sees everything that is with a clarity we are made for, but are incapable of when we are enmeshed. This shift from false to true self, from the inability to see rightly to clarity of perception, and the inability to love as Christ loves to being one in whom Christ lives and loves ("I live, yet not I, but Christ lives in me!" Gal 2:20) is the very essence of the freedom of the hermit. I want to focus on this form of freedom in this post and secondary forms in a follow-up piece.
It is not always easy to love in the selfless way Christ loved and with the generosity of God. We must be reborn and remade for that. Hermits commit (dedicate) themselves to being remade (consecrated and sanctified) in and by God. They literally dedicate themselves to being loved into wholeness/holiness. At the same time, they commit themselves to becoming the very place where heaven and earth come together and interpenetrate one another. They dedicate themselves to God's project of being Emmanuel and the corresponding human vocation of being Emmanuel in and through Christ and the power of the Holy Spirit. The natural outflow of this dedication is a love for all that God holds as precious. In Christ, our lives of prayer are not just a matter of praying for others, though of course we do that, but of becoming the intercessory "place" in our world where Human and Divine truly meet and come to abide in one another. We become symbols of what c 603 calls "the silence of solitude", symbols of genuine freedom to truly be ourselves for others, signs of liberation from the noise and enmeshment of what c 603 calls "the world", and made prophetic lives charged with challenging our Church and world to truly become/be what God wills these realities to be.This is not about just doing anything at all, or even about doing just what we truly like doing (though we are apt to really love doing what we do in this way, and being who we are in Christ). Again, it is about doing the will of God in our world. It is about being the persons God calls us to be, and doing so for the sake of God, God's Church, and the whole of God's creation. In embracing this kind of freedom and letting God grasp us, we sacrifice many of the discrete gifts God has given us in order to become the single overarching gift he makes us to be in His Son and Spirit.We trust that he knows how best to use us, and, when we look back over the whole scope of our lives, we will be amazed at the wondrousness of the tapestry he has woven with the woof of our sinfulness, illness, suffering, death, betrayals and infidelities, struggles, incapacities, ignorance, venality, etc, and the warp of God's grace, the love of others, and the passion and hard work of our own dedication to life and Love-in-Act, and the victory of meaning over absurdity. Because this use of the material of our own lives by God is not manipulative, but transformative and transcendent, it sings of an otherworldly freedom. Most people will never perceive the truth of this. Others will perhaps catch a glimpse of it. A relative few will know it themselves, even if they are not hermits. This, by the way, is one reason the life of hermits and the anchorites you refer to is known as "hidden". Superficially, such lives look limited and so constrained that we might miss that they are really about genuine freedom. That different way of seeing (or not seeing) is what your questions reflect --- the difficulty of seeing the profound (deep) freedom that constitutes a truly human life, especially when that person is a hermit or anchorite.
We tend to mistake the lives of such persons in two main ways: first, we can see them as narrow, limited or constrained in a way which seems to mean they are neither free nor particularly human, and second, we can see them as wholly disengaged from everything and uncaring of everyone of real value, and so, empty and meaningless. (This latter mistake is one that some who have called themselves "hermits" through the centuries have made, and currently still make!) The freedom of the hermit, however, is one of deep and broad engagement, pervasive and abiding love, not in the abstract, but concretely, really. Hermits reject enmeshment so we might be engaged with reality in the way Christ was and is. We do it so that he might be uniquely embodied in us in anticipation of the New Heaven and New Earth his death and resurrection inaugurated. We reject enmeshment so we might truly love --- fully, freely, and more profoundly in Christ than "the world" can even imagine.

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