It is possible for the good, even the saintly, to be subjected to a power of
evil which is too great for them to overcome – in themselves. In this case the cause (not the 'hero') was triumphant, because by the exercise of pity, mercy, and forgiveness of injury, a situation was produced in which all was redressed and disaster averted. Gandalf certainly foresaw this. See Vol. I p. 68-9.(1) Of course, he did not mean to say that one must be merciful, for it may prove useful later – it would not then be mercy or pity, which are only truly present when contrary to prudence. Not ours to plan ! But we are assured that we must be ourselves extravagantly generous, if we are to hope for the extravagant generosity which the slightest easing of, or escape from, the consequences of our own follies and errors represents. And that mercy does sometimes occur in this life.
Frodo deserved all honour because he spent every drop of his power of will and body, and that was just sufficient to bring him to the destined point, and no further. Few others, possibly no others of his time, would have got so far.
1. "Pity? It was Pity that stayed [Bilbo's] hand. Pity, and Mercy: not to strike without need. And he has been well rewarded, Frodo. Be sure that he took so little hurt from the evil, and escaped in the end, because he began his ownership of the Ring so. With Pity."'