Ecclesiastes 1:6
"The wind goeth toward the south, and turneth about unto the north; it whirleth about continually, and the wind returneth again according to his circuits."
Just as Jonah tried to avoid God's will in preaching to the Ninevites, he came back full circle to do exactly that even though he did not initially want to do so. In other words, he came back around >>>full circle<<< (like the wind goes in circles) to God's way of thinking.