God promised eternal life in Zion and desired to sit enthroned there as it's His resting place for ever and ever.

[ Psalms 132:14 ] This is my resting place for ever and ever; here I will sit enthroned, for I have desired it

[ Psalms 133:3 ] It is as if the dew of Hermon were falling on Mount Zion. For there the LORD bestows his blessing, even life forevermore.

Where is Zion? Zion is where God's feasts are celebrated (Isaiah 33:20.)

Jesus established Zion with the feasts of the New Covenant including the Sabbath day and the Passover of the New Covenant. 

However, the feasts of the New Covenant disappeared during the Dark Ages. What does this mean? Zion was ruined. According to the prophecy of the Bible, the New Covenant completed disappeared since AD325 until Christ Ahnsahnghong restored the New Covenant including the Sabbath day and the Passover of the New Covenant.

Christ Ahnsahnghong rebuilt Zion by restoring the feasts of the New Covenant. 

Who will rebuild Zion? Only God can rebuilt Zion.

[ Psalm 102:16 ] For the LORD will rebuild Zion...

Then who is Christ Ahnsahnghong? Since Christ Ahnsahnghong rebuilt Zion by restoring the feasts of the New Covenant incluidng the Sabbath day and the Passover of the New Covenant, He is God whom we seek in this age.