“Then said they unto him, What shall we do, that we might work the works of God? Jesus answered and said unto them, This is the work of God, that ye believe on him whom he hath sent.” John 6:28-29
>>Salvation is not that simple.<<
Acts 16:31 And they said, Believe on the Lord Jesus Christ, and thou shalt be saved, and thy house.
Matthew 11:30 For my yoke is easy, and my burden is light.
"For freedom Christ has set us free; stand firm therefore, and do not submit again to a yoke of slavery. Look: I, Paul, say to you that if you accept circumcision, Christ will be of no advantage to you. I testify again to every man who accepts circumcision that he is obligated to keep the whole law. You are severed from Christ, you who would be justified by the law; you have fallen away from grace. For through the Spirit, by faith, we ourselves eagerly wait for the hope of righteousness. ..." Galatians 5:1-26
"For freedom Christ has set us free; stand firm therefore, and do not submit again to a yoke of slavery." Galatians 5:1
"This matter arose because some false brothers had infiltrated our ranks to spy on the freedom we have in Christ Jesus and to make us slaves." Galatians 2:4
I can cite as many texts and more saying works are needed. Also, don’t forget the story of the unprepared virgins. Obviously their hearts were in the right place but they didn’t follow through with action. We know what happened to them.
Not sure what the slavery passages have to do with it. I don’t think they proved your point. Living in the Church Christ started, in the way He wanted us to, is not slavery. It’s joy.