en_tn/pro/28/26.md

One who trusts in his own heart

Depending on one's self is spoken of as trusting in one's own heart. AT: "The person who relies on himself" (See: rc://en/ta/man/translate/figs-synecdoche)

whoever walks

"any person who walks"

walks in wisdom

Possible meanings are 1) this is an idiom that means to live wisely. AT: "lives wisely" or 2) this is an idiom that means to follow the teachings of wise people. AT: "follows wise teachings" (See: rc://en/ta/man/translate/figs-idiom)