There's a line in "The Streetcar of Desire": No matter who you are, I always rely on the kindness of strangers.
In our daily life, we will always inadvertently receive the care and help of strangers, and we are often moved by it.
It is true that we rely on the slight kindness of strangers, and at one difficult juncture after another that we must face alone, the kindness of many strangers may not save us, but at least it will allow us to summon up the strength to move forward.
At the same time, we are strangers to others who do not know each other.
Perhaps when warmed by these kindnesses from strangers, we also send some kind signals to (or can) others, and unconsciously help the "next me.".
Whether you receive a kindness from a stranger, or you send kindness to others, or you understand, think, feel, etc. about the "kindness of strangers", it is a symbol of the beauty of the world.
In this ordinary and long world, may you always rely on the kindness of strangers.