But the 'bigness' needs to become natural in itself. In my opinion, you can't ever act well and compromise the truth of action. Acting is living truthfully under imaginary circumstances (quick, who said it?), so really , you need to truthfully be 'big'. It needs to be assumed when you step onstage, that way you never come off as being 'schmacty'.
"We don't value the lily less for not being made of flint and built to last. Life's bounty is in it's flow, later is too late. Where is the song when it's been sung, the dance when it's been danced? It's only we humans who want to own the future too."
- Tom Stoppard, Shipwreck