<span>Basically, Grendel is a novel by John Gardner
that retells the part of the Old English poen Beowulf from the perpective of
the antagonist. This novel deals with finding meaning in the world, the power
of literature, myth and the nature of the good and evil. It is a
misunderstanding hence Grendel in the novel, he portrayed as an antihero. Thus,
Grendel can understand the humans but humans cannot understand him and they
become frightened which leads to a fight between Grendel and the Danish
warriors. It was just that Grendel was saved from death at the hands of the
humans by the appearance of his mother. </span>
Answer: I think it means, the person who wrote the song wishes that they could be enough for a loved one or a friend, but can't provide that friend or family's needs, so they will still be with them, and provide what they can to the person.
