"The Seafarer" transmits both Paganism and Christianity, combining them: "Fate is stronger and God mightier than any man's mind." Although the author includes the word fate, he is talking about Christianity, because he uses fate as a meaning of destiny; also, he includes in the same sentence God, which clearly represents Christianity. .
Christianity is, nowadays, a religion that has used, somehow, a lot of lies to gain the support of the people. Sins have been pardoned in exchange of money; priests have damage our society more than any pagan religion has, harming children women, etc. Christianity now hides behind the image of the Church, convincing people that the Church is necessary: But what does an expensive and great building has to do with your faith in God? I think that's something more personal, that is absolutely not related with money or material things. Christianity now gives, probably unconsciously, more importance to things like going to Church, giving money for religious constructions, etc. Before, Christianity was, somehow, more pure, because faith was all that mattered; but their mistake was having their minds too close to receive anything else, creating the word "Pagan". They were never able to co-exist with other religions, just like nowadays. With Christianity now you can still decide your destiny; decide whether you follow good or evil, and with that, if you go to Heaven or Hell. .
Paganism before was, simply, everything that was not Christianity. The peoples that belonged to Paganism had different Gods, not only one: The God of war, the Goddess of the home, etc. Celts were Pagan, but the Romans converted them into Christianity. They believed in the inexorability of fate: It cannot be changed. You must have courage to endure your fate and accept it as inexorable; something our actions cannot change. Paganism in the Anglo-Saxon period can be easily represented with the lyric poem "The Seafarer".