Sri Aurobindo
Letters of Sri Aurobindo
Volume IV - Part 2
The avoiding of contacts does not by itself bring the fundamental immunity, it is only a change of that part of the consciousness 
that can do it. But it may be advisable to minimise the contacts that strongly bring the trouble so long as the change is not there. It is not certain that a long retirement brings about the change of the subconscient,– the long retirement of the Sannyasin is part preparation of a retirement from life altogether – it is different in our Yoga which wants to change, but not reject life.