The hostile multitudes are vast as space.

It is easier to put on slippers than to carpet the whole world. -Al Franken

What chance is there that all should be subdued?
Let but this angry mind be overthrown,
And every foe is then and there destroyed.

-Shantideva

Where would I possibly find enough leather
With which to cover the surface of the earth?
But (just) leather on the soles of my shoes
Is equivalent to covering the earth with it.

Likewise it is not possible for me
To restrain the external course of things.
But should I restrain this mind of mine,
What would be the need to restrain all else?

Shantideva

When I was a young man, I wanted to change the world.  I found it was difficult to change the world, so I tried to change my nation.  When I found I couldn’t change the nation, I began to focus on my town.  I couldn’t change the town and as an older man, I tried to change my family.  Now, as an old man, I realize the only thing I can change is myself, and suddenly I realize that if long ago I had changed myself, I could have made an impact on my family.  My family and I could have made an impact on our town.  Their impact could have changed the nation and I could indeed have changed the world.  ~Author Unknown

If you cannot control your own breath, how can you expect to control the entire world?