Ever wondered how both in the Old testament times as well as in the New testament times, most of the times, that the Scripture (Holy Bible) records the interactions that God has had with man/men/woman/women directly or through the angel of the Lord, He has called them by their first names, personally.

Let’s look at a few examples –
Cain is questioned, where is Abel thy brother? (Genesis 4:9)
Abraham, Abraham on mountain in the land of Moriah (Genesis 22:11)
Moses, Moses from the burning bush (Exodus 3:4)

When Jesus called, the IRS guy up the tree, he called him by his first name and said, Zacchaeus,  make haste and come down , for I must abide at thy house. (Luke 19:5)
On resurrection morn, Mary was asked by Jesus who said, “Woman, why weepest thou?” and until he called her by her first name “Mary”, she did not recognize him. (John 20:12-15)

If God is calling us today, are we hearing His voice; are we recognizing him.
Be assured that He is calling us by our first name, because He is a personal God and He wants to have a personal relationship with each one of us.