Is the seal in Revelation 7:2,3 the seal of the Holy Spirit? And is there a guarantee being made?

when we come to Jesus by faith at that moment we are raised from our spiritual death to spiritual life and we are sealed with a seal that we belonge to Jesus and your name is written in the book of life, and no one can snach us from his hand. we don't get forgiven we are forgiven and he makes our paths stright and he has given us everthing we need for a life in Godlyness now walk in this truth daily. study the new testament Jesus walked in perfect love all the way to the cross and fulfilled the law (ten commandments) and ushered in a new covenant hebrews 10:16,18