Of course we must fully live out the will of God with our lives, leading to our actions, abundant and self-less actions.  Self-pouring out action.  Certainly, 

But we cannot know the will of God and the particular path forward if we haven't prayed, and prayed well, open to what God is asking of us, even what He is expecting of us.

I haven't argued at all against doing.  I've argued that our doing needs to be fueled and purified with prayer, a lot of it.  As the Pope pointed out just today, again!

Otherwise our actions can become "our projects" with all the attendant ego problems....and so prone to burnout when the fun runs out of the project..and the project gets really hard.