If you fall from grace, you do something that results in a loss of respect and support, especially among those who influence your life or career.
to relapse into sin or disfavor.
to lose favor; be discredited
# The company's vice-president was expected to take over the company until he fell from grace after being arrested for stealing company funds.
# It's been sad watching so many athletes fall from grace and have their records deleted from the record books for taking performance-enhancing drugs like steroids.
# He fell from grace when the boss found out he had lied.