The Dhamma taught by Supreme Buddha needs to be realized according to the wisdom the disciple has. There were disciples who could realize the Noble Dhamma just after listening to one sentence of Buddha’s teachings in the past. There were also some other disciples who attained the Nibbana after practicing Dhamma and meditating for a long time. However, the most fortunate one said in Maha Satara Satipatthana Sutta (the Great Satipatthana Suttta) as follows: If someone practices these four types of meditations (Satara Satipatthana) prominently, then that person will become an Arahant within at least seven days or a year to the most. If that person could not attain the Nibbana within these seven years, then he will definitely accomplish the third state of the fruition, the Anagami state.