This scripture should bring peace and comfort to a lot of people who have lost loved ones. Their soul is already in Heaven under the alter of God, if they were saved Christians. I am comforted to believe my precious wife may be one of those souls already in Heaven. It also brings comfort to observe, they can communicate with God and He can communicate with everyone of them. It is comforting to think on this great message. At death we know our flesh bodies will return to the dust from whence they came, they will see corruption and never be used again. But our Souls and Spirits will return to God Who gave them. Then at the proper time, according to God's plan, He will give each one of them a body that pleases Him. I would like to add that the life you live in this flesh, will determine the kind and type of body that will please God to give you. So please be aware of this and try your best to live a beautiful life, and you will be given a beautiful life to enjoy eternally. Some may look like a rose, and others may look like a rag weed.
"And when he had opened the 5th seal, I saw under the alter the souls of them that were slain for the word of God, and for the testimony which they held: And they cried with a loud voice saying, 'How long O Lord; dost Thou not judge and avenge our blood on them that dwell on the earth?' And it was said unto them, that they should rest, yet for a little season, until their fellow servants and brethren also should be killed as they were."