bowral you are not quite right there and probably the third -
the jews were cognisant of at least a second personage and that is reported in proverbs 30:4 "who hath ascended up to heaven and descended? who hath gathered the wind in his fist? who hath bound the waters in his garment? who hath established all the ends of the world? what is his name and WHAT IS HIS SONS NAME, IF THOU CANST TELL?"
the Angel of the Lord appeared to many in particular in genesis, exodus, judges and numbers. the Angel of the Lord possessed the qualities that normally are only atributed to god
melchizedeck appeared from nowhere to abraham who also had qualities that are exclusively gods or jesus i.e. the ability to forgive sin. no angel has this power.
the opening sentences of the bible reveal another personage - "and the spirit of god moved upon the waters" - the holy spirit.
