We shall be judged by how much we love God. More specifically, he will measure how much we draw others to Christ or turn them away from him. This is a critical point, since it's easy to do what we want to do and not consider any effect our action might have on others. A good deed you do that affects others is so much more meritorious than one that just benefits you alone. And a sin that makes others also sin is indeed much graver than a sin that affects only you in private. For rapid spiritual advance, avoid all sins and concentrate upon bringing as many individuals closer to Christ as possible by your holy example and work.