# But may I never boast except in the cross

"I do not ever want to boast in anything other than the cross" or "May I boast only in the cross"

# the world has been crucified to me

"the world has died to me" or "I think of the things of the world as dead"

# and I to the world

"and I have been crucified to the world" or "and the people of the world thinks of me as dead"