When we want to save someone from an illusion or a false ideal which fulfills his solitude, we firstly try to bring him out of his solitude for listening to us.
Then, we try to make him to believe in our truth and to see his former belief as false.
But doing so, we may successfully correct his relation to us, but not exactly that belief which was a part of his solitude and, therefore, of his state of not listening to us.
If his solitude is a permanent feature of his character, he might return to his old belief in spite of its demonstrated falsity. Somehow, it is still with him. For the need of fulfilling his solitude with something is more powerful than the weak forms of communication offered by those who try to bring him among them only for a while and only for a pedagogical purpose.