We can transfer this believes to our faith. Our hearts break through injuries we got from hurting words from other people or bad thoughts. This hurts and sometimes they don´t heal completely, but god can use these flaws to shine his light through them. He uses them to reach people who don´t know him. Of course is this not pleasant, cause nobody likes to get hurt. But god can turn everything to something good. Even if we can´t see it now or even understand. God will put you back together, but maybe he won´t fix every flaw.
The lyrics from the song „Broken Vessels“ from Hillsong are exactly about this topic. Why don´t you try to pay attention to the lyrics pointedly: