we're already in His heart.
WE'RE the ones that have the option to choose or refuse.
Christ refuses no one.
WHY would The One that made us, loves us, will never forsake us need or want us to ask Him if He will let us in?
Nay ... WE must open OUR hearts and ask Him into ours.
"Behold, I stand at the door and knock. If anyone hears my voice and opens the door, (then) I will enter his house and dine with him, and he with me. Rev. 3:20