Is it possible for us to fulfill Christ's commandments? If not, why? — NuncAmissa
In the Christian view, nothing is possible without god, and all things are possible with god. So... yes, it's possible if god wills it -- which he presumably does.
Now, outside of the Christian view, I don't think it is possible for human beings to fulfill (that is, meet fully) Jesus's commands. There is no reason, however, for Christians to not try. There is no reason for anyone, Christian, pagan, heathen, atheist, Buddhist, Moslem, Jain, Hindu, Shinto, etc. to not try to be as decent to each other as we can be.
How decent we can be is depressingly slight a good share of the time.
The kind of love we are called upon to demonstrate is, I think, agape -- selfless love. I don't find myself confused by the use of "selfless love" and Christ's command to "love your neighbor as yourself". I don't know what verb Jesus used -- it definitely wasn't agape because he presumably did not speak Greek, even Koine Greek. I presume he spoke Aramaic. Loving someone else like you love yourself means being as generous to them as you are to yourself. One has to get one's own self-focused interests out of the way to love someone else that way. We aren't asked to exist selflessly -- a flat out impossibility. We are asked to be selfless sometimes; once in a while; maybe we will be called upon to be selfless once every two years; or maybe twice a day--Depends on where we are in life.
In another passage (Matthew 24) Jesus said we will be judged on whether we assisted the sick, the prisoner, the thirsty, naked, the poor, and so forth. That if we did not it would be as if we had failed to assist Christ in his needs. Selfless love, loving the neighbor as one's self, and giving assistance to those in need all fit together.
Periodically one meets someone in actual, plain, physical need. They are ordinary people in need, not professional beggars (who, of course, have problems too). If we avoid doing anything for these people in need, then we flatly fail the tests across the board. 9 time out of 10, heroic measures are not needed. But still, we find it hard to lift a finger to help.