Final answer:
The narrator's statement, 'I have to be content with what I have,' highlights his acceptance of his appearance, suggesting an understanding and eventual acceptance of his unique features.
Step-by-step explanation:
The best evidence to support the statement that the narrator feels he should accept his appearance for what it is can be found in the line, "I have to be content with what I have." This suggests that despite his desire to look like Paul Newman, the narrator understands he must come to terms with his own unique features. The mentions of his light-brown, almost-red hair and greenish-gray eyes, as well as his reflection on them, indicate an awareness and eventual acceptance of his self-image.