Create custom t-shirt design

We need to design a proffesional T-shirt for a crowdfunding campaign we are running on teespring.com. The design has to be beautiful and after creation, it should be easy to create on the teespring site. The design must be created from the words:

"I was beaten for your sake"
or "Beaten for your sake"

the concept is basically to share about the passion of Jesus Christ and how he was beaten for all mankind. It's an evangelical t-shirt and we need a quality shirt that will sell.