"There are the saints who were raptured at the beginning of the tribulation period - those are the Christians"

This quote by Tim LaHaye is describing the belief in the Rapture, which is a Christian belief that states that prior to the Tribulation period, God will remove all followers in Jesus Christ to Heaven. This is known as the Rapture of the Saints. According to this belief, those who are eliminated are the Christians who have accepted Jesus Christ as their Lord and Savior. This quote is recommending that the Christians who are removed at the start of the Tribulation period are the ones who have actually accepted Jesus Christ as their Lord and Savior. This is a crucial belief for numerous Christians, as it provides hope that they will be eliminated from the Tribulation period and be with God in Heaven. It is also a pointer to Christians to stay faithful to God and to accept Jesus Christ as their Lord and Savior, so that they may be removed during the Rapture.