do we miss going to heaven when we sin as born again christians?

I have talked to many people about our sins and even those deliberate sins we might do like adultery,stealing,smoking,lieing,looking at prono,disobedient by not obey the law of the land and etc.
They say a person can't go to heaven when they sin, and specially when they sin on purpose knowing that Gd will forgive them.
I would like to get other view on this .
The bible teaches that when we reject Jesus as our Lord ,is the only way to lose our salvation, and to be a reprobate against knowing God , and that would stop us from going to heaven.
But we can talk about this and more here.

Thank you

But, if I clearly taught elsewhere that repentance/belief alone was sufficient no one would think coming forward is necessary for salvation,or water baptism is necessary for salvation.