On the internet, this sentence is widely used to describe the journey of life, full of difficulties and challenges, but it is also worth cherishing and remembering. It symbolizes the ups and downs people have experienced and the good memories they have left. This sentence is often used to encourage people not to give up in the face of difficulties, because every step of the journey is worth cherishing.
Therefore, although we can't determine the specific source of this sentence, it has been widely circulated on the Internet and has become an infectious and enlightening literary expression.