There will come a time when the Lord God Almighty sounds the alarm and calls the elect to safety. The elect will be the disciples who believe in his promise of a resurrection, received the indwelling Holy Spirit, allowed the Holy Spirit to cleanse and sanctify them, and repented of every sin, transgression, or violation of spiritual law. Because of their repentance, they will be sufficiently clean that the Holy Spirit of God will be capable of connecting them to an anchor from heaven to enable them to be raptured.
Those who are not sufficiently cleansed will have difficulty attaching because they will be of a different energy. It would be equivalent to trying to connect a tail to a head. The anchor will be for the disciples with a teachable spirit such that they are willing to have the Lord God Almighty teach them about what violates spiritual law. They will have understood the need to learn from God in the same way that a child learns from its parent and teachers.
When the rapture happens, no one who is anchored to the earth will be taken to safety. The raptured will be those who are anchored to heaven. The anchoring of disciples will have occurred in advance of the rapture. It will be equivalent to an automatic switch that activates when certain conditions are met. Those conditions will be the antichrist's decision to implement certain policies in regard to the people of God, and in response, the people's cry for help from God. Their collective cry will activate God's rescue mission. Those who are anchored to the earth will be unaware of the antichrist's decision. They will be engaged in matters that are divorced from God's kingdom.