Often actors and singers are told, "You need to own the material." Ownership comes from making the material personal to you and allowing yourself to share that personal journey with your audience.
I believe that the script is written to serve your personal expression and not the other way around. Good script analysis should tell you the character's intention and then it's your job to find out how their intention relates to your intention in the moment. When you perform, your job is to then commit to your personal intention and use the script to communicate it. Whether you say those words or sing them, this technique will make the material yours and it will make you compelling to watch.
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