This week we review Lessons 12 and 13 of the series “The Fourth Dimension and Its Uses by Man.” From the 12th lesson we learn: “Here is the key to the manifestation of the Christ [Principle]—have faith in it. Let your mind use it and let it bear witness in our faith.” The affirmation is: I have living faith in the ruling power of the Christ Mind now manifesting in me and through me. A key idea from Lesson 13 is, “How should you know about Truth? By inner thinking. By getting still; quickening in you r soul, mind. When you get the spiritual Mind quickened, you will know you are right; you know; you will know because you will feel it, realize the expansion of your Spiritual Mind. … What is Truth? Fundamentally Truth is God; Sod is Spirit; God is Mind; God is the Source of our Intelligence.” The affirmation from Lesson 13 is: We are unified in Christ and the overcoming love of the Holy Spirit is manifesting in us and through us.