Any thing that I write on this topic right now is only because I am trying to understand it. So if you have any input please feel free to give it.
In gentleness:
Love and grace is what this means to me
"Bear one another's burdens and so fulfill the law of Christ":
Is our sin not taken care of and the old law taken away, what law is this then. Sin doesn't condemn us in any manner, this is clear. However if we take the viewpoint of Jesus looking down on his church, it is something inconvenient since it does lead us away from being able to please him as much. In earthly marriages we might observe for example that the husband dislikes eating fastfood. If the wife insists on eating fastfood and the husband is a loving husband he'll do this for his wife, but he will not be happy. If we want our groom to be happy, we know to do certain things to please him. I do think though that sin goes further than the mere act of displeasing someone. We can sin against God and also sin against man, such as if we were to be unfaithful to our spouses. I am inclined to think, though I am not sure that this passage is saying we should encourage each other to love God with a more pure love everyday and daily bring our thoughts captive so that we are not enticed by any thoughts that would lead us to sin or idolatry.