Taking the four noble truths as a process, the first and fourth noble truths can be taken as known to some degree, placing the dynamic emphasis on the second and third in the progressive development of right view. That’s why MN 117 says:
“Thus these three qualities — right view, right effort, & right mindfulness — run & circle around right view.”
The second noble truth instructs that attachment to all or any conditioned phenomena (subject to the cycle of impermanence) results in suffering. The third noble truth instructs that the extinction of craving results in the extinction of suffering. Extinction of craving is achieved by the development of dispassion for conditioned phenomena through recognizing their property of impermanence.
These second and third noble truths must be investigated and proven by the practitioner as the Buddha-to-be did prior to awakening:
Proving the second noble truth, attachment to conditioned reality results in suffering:
“And as I remained thus heedful, ardent, & resolute, thinking imbued with sensuality arose in me. I discerned that 'Thinking imbued with sensuality has arisen in me; and that leads to my own affliction or to the affliction of others or to the affliction of both. It obstructs discernment, promotes vexation, & does not lead to Unbinding.”
Proving the third noble truth, renunciation of conditioned phenomena leads to nibbana:
“And as I remained thus heedful, ardent, & resolute, thinking imbued with renunciation arose in me. I discerned that 'Thinking imbued with renunciation has arisen in me; and that leads neither to my own affliction, nor to the affliction of others, nor to the affliction of both. It fosters discernment, promotes lack of vexation, & leads to Unbinding.”—MN 19