Resurrection at the End from the Beginning
In Luke 20:37-38, Jesus said that the title "God of Abraham" proves the resurrection of the dead because God is the God of the living, not the dead. However, Paul wrote in 1 Thessalonians 4:16 that the resurrection of the faithful is still to come.
How to reconcile these two statements?
In v38, Jesus said "All are alive to God," meaning, from God's perspective, all the righteous are alive today. But God's perspective isn't ours, as He sees the end from the beginning. Abraham, with all the faithful of every age, is alive today in God's eyes, whether or not he has already been resurrected today, because God isn't limited to a linear experience of time.
To HaShem, tomorrow is today.