You really don't know anything about Jesus or the apostles do you.
Everything Jesus spoke He spoke in parables.
And the apostles only gave the milk understanding. Guess what? We are the multitude.
34 All these things Jesus spoke to the multitude in parables; and without a parable He did not speak to them,
1 Cor 3:2-3
2 I fed you with milk and not with solid food; for until now you were not able to receive it, and even now you are still not able;
3 for you are still carnal. For where there are envy, strife, and divisions among you, are you not carnal and behaving like mere men?
There is only one guarantee of salvation in the whole bible.
26 "But the Helper, the Holy Spirit, whom the Father will send in My name, He will teach you all things, and bring to your remembrance all things that I said to you.
2 Cor 5:5
5 Now He who has prepared us for this very thing is God, who also has given us the Spirit as a guarantee.