The lyrics of "One Cold Day" by Lacuna Coil talk about the feelings of loneliness, sadness, and pain that the singer is experiencing. The song conveys a sense of being lost and struggling to move on from difficult memories. The singer finds solace in crying in the rain as a way to release pent-up emotions and let go of the pain they are feeling. The chorus emphasizes the difficulty of expressing emotions and the healing power of time. The singer acknowledges that time will eventually heal the pain but admits that they are not ready to let go and move on just yet. Overall, "One Cold Day" is a heartfelt and powerful ballad that explores the challenges of letting go of past hurts and finding closure. The emotional intensity of the song is heightened by the melancholic melodies and powerful vocals of Lacuna Coil's lead singer.