It seems so obvious, right? But it's the main thing I feel like most of us have to learn.
Even in the context of my classes, adult women look to me for "permission."
"Really? I can just dance for five minutes on days when I'm extra busy?"
"Really? I can do something that feels better than the thing you're showing us?"
"Really? I can have...fun?"
Ummm...I don't know; CAN YOU?
And in discussions of spiritual practices, some variation of this is my favorite:
"Really? I don't have to meditate/do yoga/go to church/say this prayer/chant/believe in angels to be spiritual?"
Just do it.