By seeing things appear and disappear, by not clinging to an imagined permanence, we make it possible to travel to a real certainty. Earnestly considering the impermanence of all our joys and shallow consolations, we are led, in our own experience, to a recognition of the truth of dukkha — the worm in the bark, the choked-off sap, the inevitable withering of all worldly ventures. . . . When we gaze upon the turmoil of existence and realize how we and unhappy multitudes chase pleasure and catch suffering, we are shocked into fresh investigation.
— Bhikkhu Nyanasobhano, Longing for Certainty