It has been suggested that the poem was written for Thomas' dying father, although he did not die until just before Christmas 1952.[4][5] It has no title other than its first line, "Do not go gentle into that good night", a line that appears as a refrain throughout the poem along with its other refrain, "Rage, rage against the dying of the light". The poem currently remains under copyright,[note 1] although the text is available online.[6]