Final answer:
Based on the literary contexts provided, the statement that best completes the sentence is 'that I felt truly free,' reflecting themes of self-discovery and personal liberation.
Step-by-step explanation:
The completion of the sentence "It was when I found my mind was really mine" depends on the context provided by various literary sources. Given the contexts suggesting themes of freedom, self-discovery, and enlightenment, a fitting answer to the question could be "that I felt truly free." This option aligns with the experiences described in the provided references, where individuals come to an understanding of their identity, their circumstances, and a sense of autonomy and freedom.