The quote "I believe in my mask/The man I made up is me" reflects the concept of self-identity and the personas we create. It suggests that individuals often conceal their true selves behind a facade, shaping an identity that feels more comfortable or acceptable. This theme resonates with many people as they navigate their lives, adopting roles that may not fully represent their authentic selves.

In the context of Sam Shepard's life as explored in "Sam Shepard: A Life" by John J. Winters, this quote encapsulates how Shepard used performance and storytelling to express complex emotions and experiences. It speaks to the idea that the characters we portray, whether on stage or in life, can become integral to our understanding of who we are, highlighting the interplay between reality and the masks we wear.