I'm fairly certain that I remember Yancey saying this in one if his books, but I think it's a sentiment worth repeating and revisiting. Quoting from the interview:
Jesus said the truth shall set you free, and he came to give life in all its fullness. If it doesn't sound like good news, it's not the gospel. If it's not setting you free and enlarging life, then it's not Jesus's message.Your starter for six: How many 'Christian messages' (sic) not only totally fail to set people free but narrow our lives and enslave us?