The children of God who fully resemble Jesus Christ will enter the city of New Jerusalem. .In Revelation 21:21 it says that the city has twelve gates of pearl. The pearl symbolizes patience. It represents the beauty of the deeds of those who pray with tears to cast off evil and work for the kingdom of God on this earth. God remembers all our deeds of goodness and faith and rewards us for them. Therefore, obeying God's words during our lives is joy and happiness itself.