The context of the following conversation is Austin was about to steal the game but heard Sydney's voice in his head telling him not to.:
Austin says I was playing video games with Ralph..
The friend responds He has a ton of games..
Austin responds I was tempted to steal his old version of Mario Cart..
The friend responds Did you steal it?.
Austin responds I heard Sydney's voice in my head telling me not to do it so I didn't..
The friend responds Sydney is your conscience..