Sentence:  Hyperbolic geometry provides each line with two <WSD>points at infinity</WSD>. Whether there is a piece of the line beyond the <WSD>points at infinity</WSD>, completing the piece lying in the finite to a closed curve, we cannot say, since we cannot move as far as the <WSD>points at infinity</WSD>, let alone beyond them. 
Meaning of the word marked with <WSD> tags:  (hyperbolic geometry) An ideal point.