God never promised to remove all trials or to give us heaven on earth. However, He has promised that the man who separates himself from the world and gives himself over to the Lord will be blessed.
Jesus, in the Sermon on the Mount, begins to introduce a new relationship for the believer—the Sonship of the believer and the Fatherhood of God. This is not the Fatherhood of God and the brotherhood of man in the liberal tone. We have lost our relationship to God as Father by sin. However, it is restored in Jesus Christ. Those who are saved restore their relationship to the Father. Jesus demonstrated this in His relationship with the Father; then, He introduced that same relationship to the believers.
Christ the Firstfruits