Spiritual knowledge unites knower and known, while ignorance is always a cause of change and self-division in the ignorant. Hence nothing, according to sacred Scripture, will shift him who truly believes from the ground of his true faith, in which resides the permanence of his immutable and unchanging identity. For he who has been united with the truth has the assurance that all is well with him, even though most people rebuke him for being out of his mind. For without their being aware he has moved from delusion to the truth of real faith; and he knows for sure that he is not deranged, as they say, but that through truth–simple and always immutably the same–he has been liberated from the fluctuating and fickle turmoil of the manifold forms of illusion.
~St Maximos the Confessor
Prayerful Life 