This line, like most U2 lines can be interpreted as two things:
1) An actual birth of a child - Head then body then feet out of the womb. Heart is the mothers love for the child and vise/versa.
2) As is in the Anton Corbijn film, perhaps when we see someonewe like our 'mind starts to wander' and then we walk over and then start a relationship of love.
"Head first then foot Then heart sets sail"
This line, like most U2 lines can be interpreted as two things:
1) An actual birth of a child - Head then body then feet out of the womb. Heart is the mothers love for the child and vise/versa.
2) As is in the Anton Corbijn film, perhaps when we see someonewe like our 'mind starts to wander' and then we walk over and then start a relationship of love.
Maybe...