Do not go gentle into that good night by Dylan Thomas

The meaning of this poem is dark is death and light is life. He says don1t go into the night because its dark. It creates a sad mood because it talks about death. The poet repeats his self by saying don`t go gentle into the night because he telling people that the night is dark and is death don`t kill them selfs. He also repeats Rage,Rage againts the dying of the light which i think means light is life.