So..basically..salvation is conditional on faith and faithfulness. And it can be lost or maintained through faithfulness of unfaithfulness to the Covenant.
John relates as much in Revelation 17:14 writing "καὶ οἱ μετ’ αὐτοῦ κλητοὶ καὶ ἐκλεκτοὶ καὶ πιστοί".
either one believes and follows in doing as asked or one says they do and do not
[h=3]Matthew 21:28-31[/h]Authorized (King James) Version (AKJV)
[SUP]28 [/SUP]But what think ye? A certain man had two sons; and he came to the first, and said, Son, go work to day in my vineyard. [SUP]29 [/SUP]He answered and said, I will not: but afterward he repented, and went. [SUP]30 [/SUP]And he came to the second, and said likewise. And he answered and said, I go, sir: and went not. [SUP]31 [/SUP]Whether of them twain did the will of his father? They say unto him, The first. Jesus saith unto them, Verily I say unto you, That the publicans and the harlots go into the kingdom of God before you.