Depending on one's self is spoken of as trusting in one's own heart. Alternate translation: "The person who relies on himself" (See: [[rc://en/ta/man/jit/figs-synecdoche]])
Possible meanings are 1) this is an idiom that means to live wisely. Alternate translation: "lives wisely" or 2) this is an idiom that means to follow the teachings of wise people. Alternate translation: "follows wise teachings" (See: [[rc://en/ta/man/jit/figs-idiom]])