St. Charles of Sezze was a Franciscan mystic and stigmatist of the 17th century.

Although he was quite unlettered, still, through the ever increasing influence of the Holy Spirit he wrote books that number in size, and content make him one of the greatest mystical writers of the Church, ranking with St. John of the Cross and St. Teresa of Avila.

In his own times this mystical doctrine, illustrated in this Autobiography, served as a powerful counterweight to fatal Quietism and Jansenism. The canonization of St. Charles after his having remained unknown for several centuries should serve to indicate that his life and writings carry a message for modem man. His complete obedience rebukes the present-day lust for self-determination; his humility, its pride and boastfulness; his poverty, its precipitate rush after material pleasures. What he suffered at the hands of the demons also carries a lesson for modem times. It is that the devil is very much in existence, and deliberately to close our mind against the thought of him will only serve to give him greater power.

St. Charles teaches us the way to oppose the devil and all the fallen angels in their incessant warfare against our souls. Very few will ever be asked to suffer bodily harm from the devil, but all must suffer, and overcome, his temptations to pride, lust and ambition.