One who cannot cast away a treasure at need is in fetters.
(Two Towers, p. 203)
Aragorn’s words to Pippin on returning a Lórien brooch to the Hobbit reflect one of the fundamental concepts of the whole Tolkien Legendarium: it is dangerous to become unhealthily possessive of something as it can lead a character to either death, or moral downfall, or both. Fëanor grew proud and possessive of the Silmarils and turned into a rebel, who led himself and his people into dire perils and the wrath of the Valar. Morgoth became addicted to Arda in his desire to control it, and dissipated his powers only to be reduced to a pitiful, weakened state. The One Ring ensnared the wills of most of those taking it into their possession and changed them beyond recognition. Inability or, in some cases, unwillingness to disentangle from all these treasures when necessary caused the ruin of many characters. Read more