Tao Te Ching · Chapter 81

信言不美，
美言不信。
善者不辯，辯者不善。
知者不博，
博者不知。
聖人不積，
既以為人己愈有，
既以與人己愈多。
天之道，利而不害；
聖人之道，為而不爭。

Sincere words are not fine; fine words are not sincere. Those
who are skilled (in the Tao) do not dispute (about it); the
disputatious are not skilled in it. Those who know (the Tao) are not
extensively learned; the extensively learned do not know it.

The sage does not accumulate (for himself). The more that he
expends for others, the more does he possess of his own; the more that
he gives to others, the more does he have himself.

With all the sharpness of the Way of Heaven, it injures not; with
all the doing in the way of the sage he does not strive.