It is not about the reward we get. It is about Glorifying Christ in time and casting those rewards at His feet.
Rev 22:11 He that is unjust, let him be unjust still: and he which is filthy, let him be filthy still: and he that is righteous, let him be righteous still: and he that is holy, let him be holy still.
Rev 22:12 And, behold, I come quickly; and my reward is with me, to give every man according as his work shall be.
Rom 2:6 Who will render to every man according to his deeds:
Rom 2:7 To them who by patient continuance in well doing seek for glory and honour and immortality, eternal life:
Rom 2:8 But unto them that are contentious, and do not obey the truth, but obey unrighteousness, indignation and wrath,
The reward of eternal life is only for those whom obey righteousness.