As soon as everyone in the world knows that the beautiful are beautiful,

There is already ugliness.

As soon as everyone knows the able，

There is ineptness.

Determinacy (有) and indeterminacy (无) give rise to each other,

Difficult and easy complement each other,

Long and short set each other off,

High and low complete each other,

Refined notes and raw sounds harmonize (和) with each other,

And before and after lend sequence to each other—

This is really how it all works.

It is for this reason that sages keep to service that does not entail coercion (无为)

And disseminate teachings that go beyond what can be said.

In all that happens (万物),

The sages develop things but do not initiate them,

They act on behalf of things but do not lay any claim to them,

They see things through to fruition but do not take credit for them.

It is only because they do not take credit for them that things do not take their leave.

天下皆知美之为美，斯恶已；皆知善之为善，斯不善已。有无之相生也，难易之相成也，长短之相形也，高下之相盈也，音声之相和也，前后之相随，恒也。是以圣人居无为之事，行不言之教，万物作而弗始也，为而弗恃也，成功而弗居也。夫唯弗居，是以弗去。

Taken verbatim from my favorite translation:

Dao De Jing “Making This Life Significant” A Philosophical Translation (2003) by Roger Ames and David Hall.