Continuing the series on the satipatthana sutta, I give an overview of the fourth foundation of mindfulness which includes several of the Buddha's core teachings. The categories of phenomena are: The Five Hindrances, The Five Aggregates, The Six Sense-Spheres, The Seven Factors of Awakening, and The Four Noble Truths. I refer to Bhikkhu Analayo's book Satipatthana: The Direct Path to Realization and Joseph Goldstein's book Mindfulness