A Course in Meditation – Developing Your Concentration (Lesson 3.4) A Course in Meditation – Developing Your Concentration (Lesson 3.4) By Masters of Meditation | March 20, 2022 Please ensure you are logged in. See your membership status and upgrade options to ensure complete site-wide access. Or take the 7-Day Challenge: 'Maximize Your Wellness' to access these Weekly Messages. Username or E-mail Password Remember Me Forgot Password