自身

1. Origins, structure, and basic meaning

• Structure: 自身(じしん) emphasizes the very person or thing being referred to.
• Basic usage: 自分自身 emphasizes oneself, and 作者自身 emphasizes the author personally rather than someone else.

2. Common pitfalls and similar expressions

• The same reading as 自信
  • 自信(じしん) means confidence in one's ability or judgment. 自身 emphasizes the person themselves, rather than the feeling of confidence.