人情事，知非，知不非
Observing human emotions and affairs, one knows what's wrong, and knows what's not wrong.
人生事，非知，非不知
In matters of life, it's neither about knowing nor not knowing.
知：知道，知識
‘Know': to know, knowledge.
非：行似左右張開的翅膀，互相背向，故有錯誤、違背之意
'Wrong': depicted as wings spread apart, facing away from each other, hence it implies error or opposition.
 
This passage delves into the intricate nature of human understanding and the inherent duality in perception and knowledge. The juxtaposition of "knowing" and "not knowing" reflects on the philosophical nuances of awareness and ignorance in life. The symbolism of 'wrong' as wings facing away from each other encapsulates the ancient Chinese contemplation on errors and divergences.