No, you do not obey by lying and telling people that they are saved when they first believe the way OSAS believers do.
If you tell that lie, then when people fall from Grace, the you have to tell a second lie about them never having been saved in the first place, making it so no one is sure whether they said the right magic phrase or if their effort to believe was good enough this time.
Paul told us how we obey:
Romans 13:9-11
9 For this, Thou shalt not commit adultery, Thou shalt not kill, Thou shalt not steal, Thou shalt not bear false witness, Thou shalt not covet; and if there be any other commandment, it is briefly comprehended in this saying, namely, Thou shalt love thy neighbour as thyself.
10 Love worketh no ill to his neighbour: therefore love is the fulfilling of the law.
11 And that, knowing the time, that now it is high time to awake out of sleep: for now is our salvation nearer than when we believed.
Please notice that Paul did not say you received salvation when you first believed, but said that salvation is now nearer than when you first believed.
OSAS is a lie.
You are not saved yet, so keep working out your salvation with fear and trembling, the way Paul told you to do.
That way you can be sure of your salvation.
So, you feel a great need to earn your salvation huh? How are
ya doing with that? Are you saved today? Were you saved
yesterday? Will you be saved tomorrow? It just goes back
and forth with you huh?