First off we need to get to a point of understanding about what will be THE eternal life.
Most in this world think that there is only heaven and you sit about doing nothing or walking in beauty. Then there are those that actually acknowledge there is a counter to this which is hades or hell in addition to heaven. Furthermore there are even those that still believe in the Catholic made myth of purgatory, which is never mentioned in any form within the Bible.
When you truly study the Bible you come to a realization that the eternal life is beyond heaven and hades. You see, heaven and hades are merely holding placing for the souls of the departed until they receive their eternal bodies that are promised unto us within the Bible upon the return of Christ in the first Rapture, and then for those in hades at the end of the thousand year reign of Jesus Christ.
The Bible, unlike what many are hoping for these days, IS black and white, good and evil, right and wrong. In fact it is made very clear that those that live in the middle, in the grey, are rejected by the Glorified Jesus Christ Himself (Rev. 3:15-16). They are also seen as worse than those that live in the black, the evil, the wrong.
The eternal life that is to come is just that: eternal, immortal.
Does this mean that those that sin and live outside the Bible will receive eternal life? In a fashion yes. They will receive an immortal body. However they will have no freedom. In fact it is called the second the death. For even though they are living immortally they are dead to God and His Son the Lord Jesus Christ. They will be living with who they decided to follow who will be suffering just as they are suffering.
Isaiah 66:24 – And they shall go forth, and look upon the carcases of the men that have transgressed against me: for their worm shall not die, neither shall their fire be quenched; and they shall be an abhorring unto all flesh.
Revelation 21:8 – But the fearful, and unbelieving, and the abominable, and murderers, and whoremongers, and sorcerers, and idolaters, and all liars, shall have their part in the lake which burneth with fire and brimstone: which is the second death.
Revelation 20:14 – And death and hell were cast into the lake of fire. This is the second death.
Revelation 20: 10 And the devil that deceived them was cast into the lake of fire and brimstone, where the beast and the false prophet are, and shall be tormented day and night for ever and ever.
The only person that can decide on where they are going to either spend eternal life with God and Jesus or in the second death is you, yourself. You must decide for yourself to live in the here and the now, or to strive to reach for immortality with God.
You must ask Jesus to be your Savior, you must reject sin. You cannot live in sin and say you serve God. That is those that are seen as worse than those that reject God outright. You must learn the Bible and to follow its teachings. If you do this you stand a chance to make it, but only time and God will tell.