Agnes 'Sis' Cunningham;

How can you keep on moving unless you migrate too?
They tell you to keep on moving but migrate, you must not do
I'll tell you why I'm moving‚ the reason why I roam
Is to go to a new location and find myself a home

[POSTLUDE: SPOKEN]
In case the meaning of that song isn't quite clear, the word "migrate" there is used in the sense of moving to find a new home. And its about the Okies that were on their way to California and when they got to the border, they found the signs up there saying "No more migration". And the border guards were there, and they said "Turn around and keep on moving". So that's what the "How can you keep on movin' unless you migrate too?" means.