Tsenshap Serkong Rinpoche’s teachings on the Kalachakra Six-Session Guru-Yoga and the Kalachakra sadhana provide a comprehensive background to the Kalachakra Tantra and its commentarial tradition. The discourse stresses the necessity of lam-rim prerequisites, such as meditation on a precious human rebirth and developing an altruistic bodhichitta motivation, in order to prepare practitioners for tantric methods. Rinpoche introduces the main features of tantra, including protecting the mind from ordinary appearances through deity visualization and utilizing a blissful state of mind. He compares the more concise approach of the Guru-Yoga and a more elaborate deity visualization of the sadhana, including its detailed measurements. The teachings include a step-by-step explanation of the Guru-Yoga and a comparison of its stages with the main points of the sadhana.