Verb
(intransitive) To retain one's faith.
(transitive) To continue to have confidence in someone or something, and to support them or it.
Source: en.wiktionary.orgI was taught to strive not because there were any guarantees of success but because the act of striving is in itself the only way to keep faith with life. Madeleine Albright
A wise ruler ought never to keep faith when by doing so it would be against his interests. Niccolò Machiavelli
I was always concerned with writing to my age at a particular moment. That was the way I would keep faith with the audience that supported me as I went along. Bruce Springsteen
Always aim high, work hard, and care deeply about what you believe in. When you stumble, keep faith. When you're knocked down, get right back up. And never listen to anyone who says you can't or shouldn't go on. Hillary Clinton
Those who betray their friends must not expect others to keep faith with them. American Proverb
Who don't keep faith with God won't keep it with man. Dutch Proverb