Only those will be sealed who know the Word of God in Present Truth. God is gathering His body into one. These will be given power - not Pentecostal but Tabernaclist.
We, believers, are to contend for the faith that was delivered to the early church. Damnable heresies and perverse things have denied thy Only Lord God. We as true believers are to proclaim the Real JESUS as One.
Paul stated that grievous wolves would come in among the true church. Perverse things spoken not sparing the flock. Jude said these ungodly men are they that turn grace into lasciviousness.
JESUS commanded 'Be ye therefore perfect". Only those that have done the perfect will of God will enter the kingdom of heaven. Many believers do not think they can be perfect in this world.
Make sure you are a spiritual Jew and not a synagogue of satan. The essential of having your spirit circumcised. Water baptism in the name of JESUS Christ is the only way to wash away your sins.