>>If you knowingly disregard all His teachings, then you can't say you're a Christian. After all, Christian emplies "Christ Like", at least in spirit.
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>I think we agree on that.
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>>If being good is required, how do you know that you're good enough?
>>What if you're neighbor does more good things then you? Does it mean that your neighbor is a better believer then you?
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>I think that it is ultimately up to God to decide, who is more deserving.

This is true. God is the ultimate judge.

>You and me, we can easily deceive ourselves to believe that we are good, no matter how bad we really might be.

This is what Christian would say the problem is. While Christians are certain that they are made "clean/good" enough by the sacrifice of God's son, J. Christ. But people of other faith have to live their life without knowing for sure.

It also makes you wonder what motivate some to be "good". It is because they have God in their heart or do they merely want to earn points from God? Beware, some really evil people can do good deeds.

I think earning your salvation can make one arrogant and boastful, because they are so proud that they are doing so much good work. While TRUE Christian's are totally dependent on God's grace and are humbled by it.