The one part I struggle with is -accept everything-. Acceptance helps with what cannot be changed, but I have also become happier by refusing to accept certain jobs, habits, relationships...
This is what he meant I believe. Sure, you can work towards change, but today, right now, it is what it is and don’t let that get in the way of your being happy.
That is deeply compatible with using your energy to create a better world for yourself and others.