Driving through Kansas I saw
painted on a barn
two four-word sentences

Of the four unique words
the four-letter one was repeated on one line
the two-letter word repeated on the other
same positions, not adjacent, homophones
the three-letter and five-letter words
were on both lines, same positions, not adjacent

What were the sentences?
Hint: the three-letter word is “God.”
The five-letter word starts with “p.”