The details of this Dharma Talk include discussions on the Chiên Ðà Sutra and the Cát Chá Gia Na Sutra, with a particular emphasis on the Middle Way Dependent Origination Sutra (Sutra number 262 in the Pali Canon). Master Chiên Ðà sought enlightenment through the three marks of existence: impermanence of all formations, non-self of all dharmas, nirvana, and tranquil nature. However, the current Theravada tradition replaces nirvana with suffering. Thich Nhat Hanh emphasizes practical Buddhism, transforming suffering into happiness. He provides deep analysis of the three marks of existence and reflects that teachings lacking this mark are not authentic. He also discusses the transmission of teachings, the restoration of the three marks of existence, and the structure of sutras. He explains that correctly understanding the Dharma avoids dangerous misunderstandings, similar to how medicine saves lives if used correctly. He shares about transcending the extremes of existence and non-existence, understanding the principle of interbeing, and overcoming wrong views to attain enlightenment. He also discusses the law of cause and effect, the three times and two layers of cause and effect, and the teaching of the twelve links of dependent origination to deeply understand the cycle of birth and death and achieve a state of serenity.