Adopted

I am a natural-born child, so I don't know how an adopted child feels about his/her situation.
I remember a film I once saw where the mother told her adopted daughter: "You may not have come from my womb, but you were born in my heart."
To be adopted is to be chosen to be a part of something; to be chosen to have a connection with someone. It is not by chance. It is a choice by someone.
I am God's adopted child. God made a choice to call me His daughter. Will I really ever truly understand what this means? Will I ever fully act accordingly?