if you do not put 100% faith in Jesus Christ alone to save you, if you trust in the idea that "I'm a pretty good person", the God of the Bible will condemn you to everlasting torment.
reason being that there is none righteous, no not one, all have have sinned and come short of the glory of God, we are all sinners, and the wages (what you deserve) of sin is death, that death being the lake of Fire. in the eyes of God, we are all guilty deserving of eternal hellfire, because we have all sinned. in order to enter heaven, you must be perfect without flaw, not a "pretty good person", because "pretty good" isn't good enough, you must be perfect.
this is why God sent his Son Jesus Christ (who is God in the flesh), who lived a sinless life, he was perfect, without flaw. he was then crucified, died (for our sins) and was buried, and on the third day, he rose again from the dead, and ascended into heaven and is now seated at the right hand of the Father. what Jesus did (death, burial, reserrection) was enough to pay for the sins of mankind, all we must do is trust in the finished work of Jesus alone (not our own works) and we shall be saved. when the jailers asked Paul "what must i do to be saved?" they said "Believe on the Lord Jesus Christ and thou shalt be saved and thy house", he didn't say, be a "good person", he said believe
notice John 3:16 says that whosoever believeth on him should not perish but have everlasting life. how long is everlasting? forever, therefore if you believe and have everlasting life, can you lose it? no, if you believe but end up in hell, that'll make God a liar, because that life he promised is everlasting, you cannot lose your salvation.
just as there's nothing you can do to receive salvation, there's nothing you can do to lose salvation, because it from what Jesus did, not what you did.
that's what I think of this, in Light of the Bible