The list is endless (nearly). But to your question, the passage that came to my mind is from Gita which is an answer to the question on why and how should one act in the world even when knowing that the effects of these actions will always be transient and double-edged. And why does God/Ultimate Reality have an active side at all?
He whose delight is only in the (Higher) Self,
Whose satisfaction is in the Self,
And who is content only in the Self;
For him the need to act does not exist.
Therefore, constantly unattached,
Perform that action which is your duty.
Indeed, by performing action while unattached,
Man attains the Supreme.
Perfection was attained by kings like Janaka
With action alone.
For the holding-together of the world,
You should act.
(For) Whatever the greatest man does,
Thus do the rest;
Whatever standard he sets,
The world follows that.
For Me (Krishna), 0 Arjuna,
there is nothing whatever
To be done in the three worlds,
Nor is there anything not attained
to be attained.
Nevertheless I engage in action.
Indeed, if I, unwearied, should not engage
In action at all,
Mankind would follow
My path everywhere, 0 Arjuna.
If I did not perform action,
These worlds would perish
And I would be the cause of confusion and chaos,
I would destroy these creatures.
(Thus)
While those who are unwise act
From attachment to action, 0 Arjuna,
So the wise should act without attachment,
Intending to maintain the welfare of the world.
(Hence)
Deferring all actions in Me,
Meditating on the supreme Spirit,
Having become free from desire
and selfishness,
With your fever departed, Act!
