The Number 2 speaks of duality. There is a physical world (earth) and a supernatural world (heaven).  There is this world [present preparation for] and the one to come (Hebrews 13:14).

There is a man and a woman which make up a home.  The word father, Av comes from אָב which means the strong leader of the house. Jesus is the Master of the house. Hebrews 3:3,4 says, “For Jesus has been counted worthy of more glory than Moses—as much more glory as the builder of a house has more honor than the house itself.  (For every house is built by someone, but the builder of all things is God.)”. 

Jesus is also the Chief Cornerstone and Rejected Stone.

Isaiah 28:16 says,  “therefore thus says the Lord GOD, “Behold, I am the one who has laid as a foundation in Zion, a stone, a tested stone, a precious cornerstone, of a sure foundation: ‘Whoever believes will not be in haste.’” 

Ephesians 2:19,20 says, “Consequently, you are no longer foreigners and strangers, but fellow citizens with God’s people and also members of his household, built on the foundation of the apostles and prophets, with Christ Jesus himself as the chief cornerstone.”