According to spark notes, the poem Ulysses talks about a young man, Ulysses, who has accomplished so much in his time as a youth. He spent too much of his energy as a young person trying to gather knowledge about all the things that he was yet to know and everyday he made sure that there was at least something new that he learnt. Most of the things that he always strived to know were things that were not common to his peers.
Together with his men who were in the same journey of exploration with him, he pushed himself to the limit in an effort to accomplish any goal that had been set before. This pushing himself to the limit causes him to reach a point where by he can no longer stretch himself beyond his limits.