I am
100% CONVINCED that this is a question
ONLY GOD can answer, and it differs with His plan for the individual!!!!!!!
To me, the one is the person that God chooses for you, and over the course of your life, various circumstances (death/adultery/you or the other person using your free will to reject God's choice etc...)
could cause HIM to choose a different person for you, or He
could keep sending you the same person (in all cases except death--although that would be kinda cool in an eerie kinda way

, j/k-LOL

). If you do have more than one, then I agree with fishstix that you woN'T get them all at the same time. The widow(-er) argument is a weak one to me, because you never know what God has in store for them. True, HE could choose another person for them, but He doesN'T have to. And if the widow/-er was the deceased's ONLY spouse that God chose for them, wouldn't that mean that for them it was ONLY ONE.
I do
N'T believe in the "there are many ones, but you have to choose one" theory. Quite frankly,
IF it were true I'd feel
VERY CHEATED
, because I'd want to enjoy being with
ALL of my "ones"

!!!!!!!
God bless,
Onwardclimb