In Chapter 2 of Shaar HaYichud VeHaEmunah, the Alter Rebbe uses the mechanics of the miraculous Splitting of the Sea to give us a logical way of understanding why creation must be constant and continuous.

Gate of Unity & Faith: Chapter 3—Reality is Like a Sunbeam

Rabbi Shais Taub presents this text-based class of the original Tanya going word for word in Hebrew and explaining in clear, accessible English with contemporary examples and applications.