But my happiness in this world - my level of peace - is never going to be dictated by acting.

Evans draws a boundary between professional achievement and personal well-being. The line suggests a deliberate refusal to let the volatility of an acting career—auditions, public scrutiny, box-office outcomes, and fame—determine his inner stability. By separating “acting” from “happiness” and “peace,” he implies that a sustainable life requires sources of meaning outside work: relationships, privacy, routine, or values that aren’t contingent on external approval. The phrasing also hints at self-protection: if peace is not “dictated” by the job, then success or failure in that arena cannot wholly destabilize him. It’s a statement about autonomy and mental health in a high-pressure public profession.