Sometimes I have a feeling of frustration when I see non-Christian friends, as I feel really sorry that they could not share the unconditional love that God offers us (yet). However, what gets more heartbreaking is when you hear some of them deny the existence of God, especially when you feel helpless in not being able to bring them closer to God.
A heartbreaking feeling exists even when we are faced with only a few close friends. Imagine how much more pain and sorrow our Father in Heaven, Who gave life to all these people, would have to bear when they deny His existence?
Yet, "for God so loved the world, that he gave his only begotten Son, that whosoever believeth in him should not perish, but have everlasting life" (John 3:16). He loved the world so much that He offered us a gift that we humans never deserved: sending His own dear son to die for our sins and offering us eternal life.
God has not given us up. We should not give our non-Christian friends up either! Radiate yourselves for "No one lights a lamp and covers it with a bowl or puts it under a bed. Instead, he puts it on the lampstand, so that people will see the light as the come in" (Luke 8:16).