Pray hardest when its hardest to pray? I dont think this means we should pray hardest when were in the most trouble. Most of us find it pretty easy to pray when we need God to get us out of a tight spot.
It always annoys me when people attribute quotes to the wrong sources, usually to celebrities. For instance, this quote was song by Barlow Girl, but it was originally scratched onto the wall of a Cologne Germany concentration camp.