Home sweet home

Where exactly is home? How do you know for sure?
Some might say it's wherever you lay your hat, the romantics believe it's where your heart is, but can't your heart and hat be divided? Or is it that we never feel really acomplished in our own shoes?
I have 2 physical homes: one for the hat, other for the heart and seldomly they're the same.
A friend of mine says that home is where you feel at peace, which is a great thought considering that could be a spring day in the middle of winter, an afternoon walk by the sea, the sunset we elope to witness, a song that touches ours hearts, a memory shared among friends... home can be all this, or just your arms.