Four Noble Truths is one of the essential dogma of Buddhism advocated by the founder of the religion, Buddha. The Buddha claimed in his first sermon that he attained spiritual insight and freedom from future birth when he obtained absolute and intuitive knowledge of the four truths. These four principles are welcome by the entire Buddhism schools and have been liable to a comprehensible dissertation. The four noble truths are Dukkha, Samudaya, Nirodha, and Magga. The summarization of these teachings is as follows.
Suffering is the first truth. It is called dukkha (pali) and duhkha (Sanskrit). Suffering exists in our lives causes us to be stressed. It was identified in Buddha's last sermon that suffering comes with a form of birth, sickness, death, aging, unpleasant situations and experiences, not achieving what one aimed for, and any other unsatisfactory conditions of our minds and bodies.
Now, if suffering exists, then the origin of it, what causes the suffering existed too, which on the other hand becomes the second truth, Samudaya (Pali and Sanskrit).
Buddha associated Samudaya, in his first sermon, with craving or attachment. In addition, it was understood by other Buddhists that the causes of suffering are rooted in bad habits or negative actions as they will lead to unpleasant consequences. Therefore, committing crimes, dishonesty, robbery is one of the causes of suffering.
To end the suffering, one should follow the process to stop such. The fourth truth is the Path to the Cessation of Suffering or Magga (Pali) and Marga (Sanskrit). Among all the noble truths, this one is more complex as this has something to do with how to end suffering since it is believed that any form of suffering can end indefinitely.
These four principles of truth go around with the existence of suffering, which served as the foundation of Buddhism.
Source: Lopez, Donald S.. "Four Noble Truths". Encyclopedia Britannica, 14 Mar. 2017, https://www.britannica.com/topic/Four-Noble-Truths. Accessed 8 August 2021.