What does it mean that Christians are the 'apple of His eye'?

The term 'apple of His eye' denotes a special favor and intimate relationship between God and His people. Zechariah 2:8 captures this affection, illustrating how touch on God's people evokes immediate divine concern and care. Just as the eye is one of the most vulnerable and sensitive parts of the body, this description implies that God watches over His people with great diligence and love. This metaphor not only assures believers of their value in God's sight but also encourages them to draw near in faith, resting in the knowledge that they are nurtured and defended by the Creator, who is ever-present and deeply aware of their circumstances.