Pastor Chad Veach is using his own life experiences to share the Lord's good news by spreading hope.

In his new book, Unreasonable Hope, Veach shares his family's journey when his daughter Georgia was found to have a rare brain disorder, making each day a constant battle. Through the book, Veach reveals how faith has helped him deal with pain, and how God's love and faithfulness became steps to get through the struggle.

"Once you see something you can't unsee it. Hope has a name and His name is Jesus, and once you realize Jesus is our hope, you're good. You don't have to keep mustering it up," he said.

"Hope is not hype, hope is Jesus. Jesus is the hope of the world, He's the hope for humanity. So I'm not hoping that Jesus has an answer, I believe Jesus is the answer. So when you get Jesus in you, you get hope. And I guess I never realized that's who Jesus is in my life — he's hope," he added.

In an interview with Christian Post, the pastor revealed that among the main things that got them through the pain and the struggle of dealing with his daughter's illness was the support of a strong faith community, who rallied and prayed for their family.

The overwhelming outpouring of support for his daughter actually became a movement when he had himself tattooed with the letter G on his wrist so that he could pray for his daughter whenever he looks at it.

Celebrities and athletes like Justin Bieber, Tyson Chandler, Hailey Baldwin, Ashley Benson and Rickie Fowler have also got the letter tattoed on their wrists in honour of Georgia, starting the G-tat movement.

Veach said that while the movement may have started for Georgia, it eventually evolved into a testament to the goodness of humanity.

"The G tat movement might have started from my daughter but I think somewhere it turned into a symbol of hope. Simple symbols are so powerful. I think that the 'G' is symbolic of grace, symbolic of hope, it's moved past Georgia a long time ago," he said.