The promises of God are without repentance.Jesus never made a UNCONDITIONAL promise of everlasting life.
Everlasting life is everlasting whether I possess the promise of it or not.
1 Jn 5:13 "These things have I written unto you that believe on the name of the Son of God; that ye may know that ye have eternal life, and that ye may believe on the name of the Son of God."
The verb believe is present tense denoting a sustained ongoing belief. So one can conditionally have eternal life as long as he believes. One can also know if he quits believing he no longer has eternal life.
Eph 5:23 "For the husband is the head of the wife, even as Christ is the head of the church: and he is the saviour of the body".
Christ is the Saviour of the body, which is the church. So the church is what is saved, so if an individual has a desire to be saved, then he must be in the church/the body. No individual can be saved separate, apart from that corporate body, the church.
Jesus never saved a church. Jesus saved individuals who received Him as Savior.
You need to meet the Jesus of the bible whom to know aright is life eternal.
The Philippian jailer did not ask what must we do to be saved but what must I do to be saved.
What have you done? God is not going to ask what church are a member of but what have you done with My Son Jesus.
For the cause of Christ
Roger