I think it's all been said from what I've read in the answers already given to you. If you read Revelations it will tell you that there has to be great suffering in this world for -- here scholars tend to disagree -- seven years. Satan, Lucifer, the devil, the banished child of our Creator, will rule the world in these last days of the earth as we know it. This is called the Great Tribulation.
During the Great Tribulation, all people of the earth will have to choose. Some will take the easy way out and choose to side with Lucifer. These people will wear the mark of the beast "666" somewhere on their body. Again, scholars disagree where the mark might be placed. Some say the forehead; others think the back of the hand. Where ever this mark is to be placed, anyone who refuses to accept the mark of the beast, will be put to physical death by Lucifer and his minnions.
Once a person has made the choice to wear the mark of the beast, they are NOT allow to change their minds. When Jesus returns in His glory, the people who have remained true to Him (those who have survived the Great Tribulation and those who have perished in the name of the Lord), will be brought back. These people will be taken to live with Jesus and His Father. The others will banished to eternal suffering with Lucifer.
I know this is rather long, but I hope it helped you to understand. We are all given free agency on the earth. The person who made that comment to you, has chosen to reject the sacrafice that Jesus made for all of us. When his or her time comes to face Heavenly Father, that person will have answer for the things done and not done in their time here on earth.
God bless you!
Cheryl