I bet you didn't know you had a grandfather Abraham.
You do, if your faith is in Christ:
"And if you are Christ’s, then you are Abraham’s offspring, heirs according to promise" (Gal.3:29).
So what's the significance of having Abraham as your grandpa?
Well...
God promised to enter a special relationship with Abraham, give him land, and bless all the families of the earth through his seed (Gen.17:1-14).
This promise was initially fulfilled in the blessings of the Promised Land in the Middle East.
But through Christ, this blessing was extended to the whole world (Ps.2:7-8)...
... and, as a joint-heir with Christ, you share in this larger promise to bless the nations (Rom.8:17).
This means -- thanks to your grandpa Abraham, and your Lord and Savior Jesus Christ -- the world is yours to bless.
Go do that today.