Wherefore, as by one man sin entered into the world, and death by sin; and so death passed upon all men, for that all have sinned:
For all have sinned, and come short of the glory of God;
For the wages of sin is death; but the gift of God is eternal life through Jesus Christ our Lord.
But God commendeth his love toward us, in that, while we were yet sinners, Christ died for us.
For as by one man's disobedience many were made sinners, so by the obedience of one shall many be made righteous.
For God so loved the world, that he gave his only begotten Son, that whosoever believeth in him should not perish, but have everlasting life. For God sent not his Son into the world to condemn the world; but that the world through him might be saved. He that believeth on him is not condemned: but he that believeth not is condemned already, because he hath not believed in the name of the only begotten Son of God.
Do you know for an absolute fact that you're going to Heaven when you die? You are going to die, aren't you? The Bible says,
That if thou shalt confess with thy mouth the Lord Jesus, and shalt believe in thine heart that God hath raised him from the dead, thou shalt be saved. For with the heart man believeth unto righteousness; and with the mouth confession is made unto salvation. Romans 10:9-10
For by grace are ye saved through faith; and that not of yourselves: it is the gift of God: Not of works, lest any man should boast. Ephesians 2:8-9
I do not frustrate the grace of God: for if righteousness come by the law, then Christ is dead in vain. Galatians 2:21