Dhamma Padaya – Marga Waggaya
When a person starts to contemplate wisely and consciously, at some point, he realises that his ideas and thoughts, his willingness-reluctance, and everything in this world are subject to emerge, exist and disappear.
He realises that he had to suffer so far because of the clingings that formed, not knowing about the erratic nature of worldly things as well as the erratic nature of his own willingnesses-reluctances.
Then he is frustrated with the ‘Craving-Obstinacy-Arrogance’ created by the deceptive thought of ‘I- Mine- My soul’ about his own body and mind.
That kind of frustration is what leads him to ‘Nirwana’.