Some who is honest could also be described as trustworthy. A person who is trustworthy is someone who has earned your trust because you can depend on them to always tell the truth no matter what. Honesty also extends to what you do when the other person is not around. A person can always tell the truth when asked but hide the truth when not asked. Another person can tell the truth when asked but do things that are dishonest, like cheating, stealing and fraud.
The person's lifestyle must depict trustworthiness in all aspects. That trustworthiness must include the fact that they will never steal from you or anyone else, if they find a purse on the street they will return it or hand in to the police, there are many things I could use to illustrate this.
Honesty is a character trait and not just a one off thing.