For the folkloric record, here is the complete post to namethathymn.com God Specializes that was written by Vic Eliason:

[Btw, the name of that discussion was "Got Any Rivers?]

20 Jul 2008 15:48   

"Guest

My father is Oscar C. Eliason. Dad wrote the chorus in 1929.
He was dying of TB in a Minneapolis hospital and an elderly
minister came by one evening and prayer was offered. The next
day be began to improve and he continued to improve to such an
extent that the Doctors admitted that something out of the ordinary
had happened. As he was getting better he saw an adv. in the
Minneapolis Star Tribune by a construction company that used the
slogan. He changed the words to:

Got any rivers you think are uncrossable
Got any mountains you can't tunnel through
God specializes in things thought impossible
He does the things others cannot do.

because it spread from mouth to mouth it became altered in
many interesting ways.

The story of how the verses were written in the later years
is a very interesting one and anyone interested may contact me
at [email address deleted]

What a joy to know that this little chorus has touched and encouraged
so many lives.

God Bless you.

Vic Eliason, Vice President
VCY America Radio Network
[phone number deleted]"