Peter asked Jesus how many times he had to forgive someone who kept wronging him. Seven times seemed generous. Jesus answered seventy times seven. He wasn't giving Peter a bigger number to keep track of. He was telling him to stop counting.
We can forgive like that because we've been forgiven like that. The thorns are what Jesus carried to the cross to pay for our sin, and the infinity is how far His forgiveness reaches. It never runs out, so ours shouldn't either.
The back shows a sketched crown of thorns bent into an infinity sign, with 70 x 7 above it and Matthew 18:22 printed beneath. On the front, a quiet FOR HIS GLORY.
Wear it on the course, at home and on the days when forgiving someone is the hardest thing you'll do.