This will happen if you continue strong and sure in your faith. You must not be moved away from the hope brought to you by the Good News that you heard. That same Good News has been told to everyone in the world, and I, Paul, help in preaching that Good News.
So be careful and do not refuse to listen when God speaks. Others refused to listen to him when he warned them on earth, and they did not escape. So it will be worse for us if we refuse to listen to God who warns us from heaven.
So surely we also will be punished if we ignore this great salvation. The Lord himself first told about this salvation, and those who heard him testified it was true.