No, no mistake...
Because of what both Jesus and Paul said, salvation is not a done deal, salvation is a process...until the end of our life or the end of the world, whichever comes 1st...
"But the one who has endured to the end will be saved." Matthew 24:13
“Keep working out your own salvation with fear and trembling.” Philippians 2:12
Nor can we take that process of salvation for granted...
For as regards those who were once enlightened
+ and who have tasted the heavenly free gift and who have become partakers of holy spirit
5 and who have tasted the fine word of God and powers of the coming system of things,
6 but
have fallen away,+ it is impossible to revive them again to repentance," Hebrews 6:4-6
"For if we practice sin willfully after having received the accurate knowledge of the truth,
+ there is
no longer any sacrifice for sins left," Hebrews 10:26,.