There is one body, and one Spirit, even as ye are called in one hope of your calling; One Lord, one faith, one baptism, One God and Father of all, who is above all, and through all, and in you all. Ephesians 4:4-6

Two Questions:

1.    Can a person be saved without the right understanding of these seven ones?

2.    Can two people who disagree on these seven ones be in fellowship?

I have given them the glory that you gave me, that they may be one as we are one - John 17:22