As to your first question, Scripture is silent as to whether or not we will remember unsaved loved ones who do not repent and are lost for all eternity. If we do remember them, it will NOT take away from the absolute bliss we will experience in heaven. In Revelation 21:3-4 we read, “And I heard a loud voice from heaven saying, ‘Behold, the tabernacle of God is with men, and He will dwell with them, and they shall be His people. God Himself will be with them and be their God. And God will wipe away every tear from their eyes; there shall be no more death, nor sorrow, nor crying. There shall be no more pain, for the former things have passed away’” (NKJV). This passage is describing the bliss of heaven and how we will never suffer the consequences of sin every again, including SORROW or CRYING. I have talked to many people who can’t imagine being happy in heaven if their loved ones aren’t there and they go on to say that they would be filled with sorrow for ever. These wonderful verses teach us otherwise. We will be blessed throughout the endless ages of eternity as we live in God’s presence. We will then know the true meaning of King David’s words about God’s presence in Psalm 16:11, “In Your presence is fullness of joy; at Your right hand are pleasures forevermore.”

Regarding your second question, it is not within your power to “convince your son that the only truth is the word of God.” Your responsibility (and privilege) is to present the Word of God to him and then pray for his eyes to be opened to accept the Bible as God’s revelation to mankind. When we do show our loved ones the Word of God we are simply “God’s messenger with His message,” but it is only by the grace of God that they will receive it as such. The Apostle Paul spoke on this subject in 1st Corinthians 3:5-7, “Who then is Paul, and who is Apollos, but ministers through whom you believed, as the Lord gave to each? I planted, Apollos watered, but God GAVE THE INCREASE. So then neither he who plants is anything, nor he who waters, but God WHO GIVES THE INCREASE.” Just as a farmer sows seed in the ground and then waits for God to give the needed rain and sunshine to produce fruit, so we plant the Word of God in the hearts of men, women, boys and girls and wait for God (by the Holy Spirit) to produce the fruit of salvation in their hearts.

When our loved ones (or friends, neighbors, co-workers, et al.) do receive the Word of God we will give God all the glory for working in their hearts. In 1st Thessalonians 2:13 Paul wrote, “For this reason we also THANK GOD WITHOUT CEASING, because when you received the word of God which you heard from us, you welcomed it not as the word of men, but as it is in truth, the word of God, which also effectively works in you who believe.” This truth should embolden us to share the Word of God with lost sinners, knowing that God’s Word is powerful and if souls will simply accept it as His Word it will indeed work effectually to the saving of their souls. Romans 1:16 and 10:17 declare, “I am not ashamed of the gospel of Christ, for it is the power of God to salvation for everyone who believes…Faith comes by hearing, and hearing by the word of God.” (364.3)  (DO)