The Four Seals
According to Buddhism, a thorough understanding of the “Four Seals” can bring an end to suffering. Some Buddhist traditions mention only the first three together, referring to them as the “Three Marks of Existence” or “Three Signs of Being.” Other traditions add the fourth, to explain that the first three are not the be all and end all of things.
The first three apply without fail to everything in this world, everything material, objective, and conditioned, and are thus a brief summary and diagnosis of the very nature of Samsara. The fourth points to Nirvana.
The late Venerable Lobsang Gyatso of the Gelugpa tradition of Tibetan Buddhism wrote that “All Buddhist teachings can be condensed into these four points,” adding that “These four points are seen as the root of Buddhism.”
“With the words ‘impermanent,’ ‘suffering,’ ‘selfless,’ and ‘peace’ the Buddhas who know all means persuade sentient beings to generate weariness with the three realms of existence and to fully enter into the state beyond torment and pain.” — Uttara Tantra (Ratnagotravibhaga)