The phrase " to do (something) justice" means to do something well enough to match the original beauty or the original high quality of the thing.

“to do (something) justice”的意思是把某件事做得足够好，以符合事物本来的美或本来的高品质。

I advocate them: I am sworn to spread them.  Won in youth to religion, she has cultivated my original qualities thus: —From the minute germ, natural affection, she has developed the overshadowing tree, philanthropy.

我提倡它们：我发誓要传播它们。她从小就皈依了宗教，她这样培养了我最初的品质：——从微小的萌芽，自然的情感，她培育出了遮荫的大树，慈善事业。