Ephesians 1
13 In whom ye also trusted, after that ye heard the word of truth, the gospel of your salvation: in whom also after that ye believed, ye were sealed with that holy Spirit of promise,
14 Which is the earnest of our inheritance until the redemption of the purchased possession, unto the praise of his glory.
After believing on the gospel of Jesus Christ for sin, one is sealed by the Holy Spirit for the redemption which is the redemption of the body (see also Romans 8:23). Belief in the gospel for sin is a one time thing that guarantees your future. It's that simple. Change your mind and believe.
I forgot to add...no works were involved on man's part.
13 In whom ye also trusted, after that ye heard the word of truth, the gospel of your salvation: in whom also after that ye believed, ye were sealed with that holy Spirit of promise,
14 Which is the earnest of our inheritance until the redemption of the purchased possession, unto the praise of his glory.
After believing on the gospel of Jesus Christ for sin, one is sealed by the Holy Spirit for the redemption which is the redemption of the body (see also Romans 8:23). Belief in the gospel for sin is a one time thing that guarantees your future. It's that simple. Change your mind and believe.
I forgot to add...no works were involved on man's part.
Checkout what in verse 10 what earnest means and then see how that relates to UNTIL the redemption of the purchased possession.
A earnest agreement as you will see has a role held to both participating parties.