A common reason many unbelievers cite as a reason for disbelief in God is the failures of those who claim to be Christians. Their reasoning is “if they (Christians) don’t live what they believe, then it must not be true.”
However, God says otherwise. Romans 3 tells us that we are all accountable for our own lives and responses to the truth of God, no matter how well someone else may live it themselves. Believers and unbelievers alike are responsible for their own personal holiness.