Perhaps all we can say of great acting is that it involves assimilation rather than accumulation, that the performer isn't so much a surrogate as a vessel.
( Perhaps ( ( all ( we ( can ( say ( of ( great acting ) ) ) ) ) ) ( ( is ( that ( it ( ( ( involves ( ( assimilation ( rather than ) ) accumulation ) ) , ) ( that ( ( the performer ) ( ( ( is n't ) ( so much ) ) ( ( a surrogate ) ( as ( a vessel ) ) ) ) ) ) ) ) ) ) . ) ) )
(ROOT (S (ADVP (RB Perhaps)) (NP (NP (DT all)) (SBAR (S (NP (PRP we)) (VP (MD can) (VP (VB say) (PP (IN of) (NP (JJ great) (NN acting)))))))) (VP (VBZ is) (SBAR (IN that) (S (NP (PRP it)) (VP (VBZ involves) (NP (NP (NN assimilation)) (CONJP (RB rather) (IN than)) (NP (NN accumulation))) (, ,) (SBAR (IN that) (S (NP (DT the) (NN performer)) (VP (VBZ is) (RB n't) (ADVP (RB so) (RB much)) (NP (NP (DT a) (NN surrogate)) (PP (IN as) (NP (DT a) (NN vessel))))))))))) (. .)))
An actor is judged solely on quality of performance.
( ( An actor ) ( ( is ( ( judged solely ) ( on ( quality ( of performance ) ) ) ) ) . ) )
(ROOT (S (NP (DT An) (NN actor)) (VP (VBZ is) (VP (VBN judged) (ADVP (RB solely)) (PP (IN on) (NP (NP (NN quality)) (PP (IN of) (NP (NN performance))))))) (. .)))