Who makes your choices?

The following is an excerpt from a samvaad (dialogue) session with Acharya Prashant.

Questioner: Acharya Ji, in the previous discourse you mentioned that one should always choose That, instead of money, or fame, or otherworldly things. But who is the one who makes this choice? Is that the same ‘I’, that same Ego that makes choice? Can it ever make choice against itself? What is that part of us that makes this choice?