Episode 1 -- Treatise on Peace of Soul c1 -- Importance of the Human Heart

Why is it so important to guard the human heart?

We begin a new book! Besides The Spiritual Combat, Fr Lorenzo Scupoli wrote a little masterpiece, A Treatise on Peace of Soul. This new book is much shorter, 15 chapters. The first chapter is about the place of the human heart in the spiritual life. What did God make the human heart for? And how must it be guarded?