Years ago, many of us got the impression that many people were going to hell. Lately, despite the increase of sin (see Rm 5:20), many people have the impression that few people go to hell. However, Jesus stated that many people choose to travel the road to damnation and few find the road to life (Mt 7:13-14). This is a sobering statement.
Jesus also declared that publicly calling Him "Lord" would not get us into His kingdom. Only those who do the will of their heavenly Father enter God's kingdom (Mt 7:21). Even if we prophesy, drive out demons, and do miracles in Jesus' name, we are not assured of entering God's kingdom (Mt 7:22; cf 1 Cor 13:2-3). The Lord may say to prophets, exorcists, and miracle-workers: "I never knew you. Out of My sight, you evildoers!" (Mt 7:23) As we listen to Jesus' words, it doesn't seem that everyone is going to heaven.
We do not have to despair of eternal salvation, but we must build our lives on the rock of hearing and doing God's words (Mt 7:24). If this book, One Bread, One Body, helps you to do this, praise God!