Even the wise cannot see all ends
‘I am sorry,’ said Frodo. ‘But I am frightened; and I do not feel any pity for Gollum.’
‘You have not seen him,’ Gandalf broke in.
‘No, and I don’t want to,’ said Frodo. ‘I can’t understand you. Do you mean to say that you, and the Elves, have let him live on after all those horrible deeds? Now at any rate he is as bad as an Orc, and just an enemy. He deserves death.’
‘Deserves it! I daresay he does. Many that live deserve death. And some that die deserve life. Can you give it to them? Then do not be too eager to deal out death in judgement. For even the wise cannot see all ends”
– J.R.R Tolkien. Lord of the Rings. The fellowship of the Ring, Book one, chapter II, p. 58. 2001. Harper Collins Publishers.