John 6:66 From that time many of his disciples went back, and walked no more with him. 67 Then said Jesus unto the twelve, Will ye also go away? 68 Then Simon Peter answered him, Lord, to whom shall we go? thou hast the words of eternal life. 69 And we believe and are sure that thou art that Christ, the Son of the living God.
Jesus, during his ministry, preached the gospel of the kingdom of God.
After his death, resurrection and ascension to Heaven, the apostles preached the gospel concerning the kingdom of God and the name of Jesus Christ.
Acts 8:12 But when they believed Philip preaching the things concerning the kingdom of God, and the name of Jesus Christ, they were baptized, both men and women.
Those who heard it, understood it, and believed it, were required to:
1. Repent of their sinful way of life – change the way they live.
Acts 2:37 Now when they heard this, they were pricked in their heart, and said unto Peter and to the rest of the apostles, Men and brethren, what shall we do? 38 Then Peter said unto them, Repent…
2. Be baptised by immersion in water into Jesus Christ for the remission of past sins.
Acts 2:38… and be baptized every one of you in the name of Jesus Christ for the remission of sins…
Acts 22:16 And now why tarriest thou? arise, and be baptized, and wash away thy sins, calling on the name of the Lord.
3. Live a new life by the commandments of Jesus Christ
Romans 6:4 Therefore we are buried with him by baptism into death: that like as Christ was raised up from the dead by the glory of the Father, even so we also should walk in newness of life.
John 15:14 Ye are my friends, if ye do whatsoever I command you.
4. Sins committed after baptism will be forgiven by confession in prayer, providing we are making a determined effort to live by Christ’s precepts.
1 John 1:7 But if we walk in the light, as he is in the light, we have fellowship one with another, and the blood of Jesus Christ his Son cleanseth us from all sin. 8 If we say that we have no sin, we deceive ourselves, and the truth is not in us. 9 If we confess our sins, he is faithful and just to forgive us our sins, and to cleanse us from all unrighteousness.
We cannot attain to righteousness by our own works (i.e. keeping the Law of Moses) – our faith will be counted for righteousness.
Romans 4:5 But to him that worketh not, but believeth on him that justifieth the ungodly, his faith is counted for righteousness.
Faith must be demonstrated by works of faith for without works faith is dead.
James 2:17 Even so faith, if it hath not works, is dead, being alone.
Those who believe and are baptised into Christ have one ordinance to keep. That is, to meet often with fellow believers to share bread and wine in remembrance of Jesus’ sacrifice.
Paul explains this in1 Corinthians 11:
1 Corinthians 11:23 For I have received of the Lord that which also I delivered unto you, That the Lord Jesus the same night in which he was betrayed took bread: 24 And when he had given thanks, he brake it, and said, Take, eat: this is my body, which is broken for you: this do in remembrance of me. 25 After the same manner also he took the cup, when he had supped, saying, This cup is the new testament in my blood: this do ye, as oft as ye drink it, in remembrance of me. 26 For as often as ye eat this bread, and drink this cup, ye do shew the Lord’s death till he come. 27 Wherefore whosoever shall eat this bread, and drink this cup of the Lord, unworthily, shall be guilty of the body and blood of the Lord. 28 But let a man examine himself, and so let him eat of that bread, and drink of that cup. 29 For he that eateth and drinketh unworthily, eateth and drinketh damnation to himself, not discerning the Lord’s body.
It was Jesus’ statement that they must eat his flesh and drink his blood which caused many to go away. In sharing bread and wine we recognise that they represent the ‘doing’ of the commandments of Jesus – to live our lives as he lived his – by self-denial and service to God.
The call is in the scriptures – God doesn’t call us supernaturally.
1 Corinthians 1:21 For after that in the wisdom of God the world by wisdom knew not God, it pleased God by the foolishness of preaching to save them that believe.
It is the scriptures which can make us ‘wise unto salvation’.
2 Timothy 3:15 And that from a child thou hast known the holy scriptures, which are able to make thee wise unto salvation through faith which is in Christ Jesus. 16 All scripture is given by inspiration of God, and is profitable for doctrine, for reproof, for correction, for instruction in righteousness: 17 That the man of God may be perfect, throughly furnished unto all good works.
May I suggest that you read: ‘Your Share in God's Promises’ here:
I hope you find this helpful.