Important to note here is the fact that not only were Moses and Elijah recognizable to the Lord, but they were known to the disciples also. Peter certainly knew them, for he said: "Jesus, Master, it is good for us to be here: and let us make three tabernacles: one for Thee, and one for Moses, and one for Elijah” (Luke
The fear that we will be sorrowful, at least at first, when we recognize that loved ones may not be in heaven with us is really an unfounded fear in that God has promised to eliminate sorrow (Rev. 21:4). If such is the will of God then that is how it shall be. Scriptures such as the Luke 16:23 show us that the same will not be true for those who are cast into torment. The rich man was actually concerned that his loved ones would end up in the same place; in fact we could infer that it was part of his torment.
Heaven will be a place of endless fellowship with those who are saved. Jesus said: "And I say unto you, that many shall come from the east and west, and shall sit down with Abraham, Isaac, and Jacob, in the kingdom of heaven” (Matt.
We see this mutual recognition in the writings of the apostle Paul as well. In his first Epistle to the Thessalonians, Paul wrote: "For what is our hope, or joy, or crown of rejoicing? Are not even ye in the presence of our Lord Jesus Christ at His coming? For ye are our glory and joy.” (1 Thess. 2:19-20) Obviously Paul fully expected to meet the converts from Thessalonica in Heaven, and furthermore, he looked forward to being able to distinguish them from others who had found Christ during the years of his ministry. Paul also taught that those who were begotten of his preaching and teaching would indeed know him in the world to come. Paul wrote, "As also ye have acknowledged us in part, that we are your rejoicing, even as ye also are ours in the day of the Lord Jesus.”
(2 Cor.1:14)
In researching the question, "Will We Know One Another In Heaven?”, I found no Scripture that positively proved we would not have an active recognition of those we have known in this present life. In regard to the sadness aforementioned, we must realize that in some way God will either eradicate memories that would cause us grief, or give us a peace that cannot feel anxiety or depression. For this is indeed a promise of God.