It's from a book but I'm gonna try to translate. So... it's says like „you can think that you're ok and you can imagine that you're strong but a color that you saw before in a room or on the sky in the morning, a perfume that you liked in the past and it's reminds you of smt good from your past, a verse of a poem that you forget and you remember it random, a musical note that you didn't sing for a long time, listen to me, Dorian, on that things depend our life"