And now, a pause for the words of Shantideva

Guide to the Bodhisattva Way of Life--

From Chapter 5: Guarding Introspection

13. Where would there be leather enough to cover the entire world? The earth is covered over merely with the leather of my sandals.
14. Likewise, I am unable to restrain external phenomena, but I shall restrain my own mind, what need is there to restrain anything else?

From Chapter 6: Patience

33. Therefore, upon seeing a friend or an enemy committing a wrong deed, one should reflect, "Such are his conditions," and be at ease.
34. If all beings would find fulfillment according to their own wishes, then no one would suffer, for no one wishes to suffer.

(These are not the most fluid translations, but rather the ones found easily online. Here's the monk-approved translation we read at my sangha; here's the version with excellent commentary some members bring instead.)