Sorrow and happiness are the heresies of virtue; joy and anger lead astray from TAO; love and hate cause loss of virtue. The heart unconscious of sorrow and happiness - that is perfect virtue. One, without change - that is perfect repose. Without any obstruction - that is the perfection of the unconditioned. Holding no relations with the external world, - that is perfection of the negative state. Without blemish of any kind, - that is the perfection of purity.
ZhuangziOnce Chuang Chou dreamt he was a butterfly, a butterfly flitting and fluttering around, happy with himself and doing as he pleased. He didn't know he was Chuang Chou. Suddenly he woke up and there he was, solid and unmistakeable Chuang Chou. But he didn't know if he was Chuang Chou who had dreamt he was a butterfly, or a butterfly dreaming he was Chuang Chou.
ZhuangziThe knowledge of the ancients reached the highest point-the time before anything existed. This is the highest point. It is exhaustive. There is no adding to it.
ZhuangziThe love of a Sage for his fellows likewise finds expression amongst mankind. Were he not told sop, he would not know that he loved his fellows. But whether he knows it or whether he does not know it, whether he hears it or whether he does not hear it, his love for his is without end, and mankind cease not to repose therein.
Zhuangzi