"These four things, bhikkhus, are true, unerring, and not otherwise. What four? 'This is suffering,' bhikkhus, this is true, this is unerring, this is not otherwise; 'This is the arising of suffering,' this is true, this is unerring, this is not otherwise; 'This is the ending of suffering,' this is true, this is unerring, this is not otherwise; 'This is the way of practice leading to the ending of suffering,' this is true, this is unerring, this is not otherwise. These, bhikkhus, are the four truths that are true, unerring, and not otherwise.

Therefore, bhikkhus, effort should be made to fully understand: 'This is suffering'; effort should be made to fully understand: 'This is the arising of suffering'; effort should be made to fully understand: 'This is the ending of suffering'; effort should be made to fully understand: 'This is the way of practice leading to the ending of suffering.'"