“I will pour out My Spirit on your offspring and My blessing on your descendants; and they will spring up among the grass like poplars by streams of water. This one will say, ‘I am the Lord’s’; and that one will call on the name of Jacob; and another will write on his hand, ‘Belonging to the Lord,’ and will name Israel’s name with honor” (Isaiah 44:3-5, NASB).
Have you ever written a phone number, address, or other short note on the palm of your hand? Perhaps you needed to remember some important information that you would need to reference later.
When God gives us His Spirit to dwell in us, it is like He puts a divine notation on us that we belong to Him, that we are His people and thereby eligible for all the benefits and blessings inherited by His children.