“Everything, absolutely everything on this earth makes sense, and even the smallest things are worthy of our consideration.”

Source: Dandelion Wine

Source: To All the Boys I've Loved Before

Source: Kafka on the Shore

The Secret of the Machines, Stanza 7.
Other works
Context: But remember, please, the Law by which we live,
We are not built to comprehend a lie,
We can neither love nor pity nor forgive,
If you make a slip in handling us you die!
We are greater than the Peoples or the Kings—
Be humble, as you crawl beneath our rods!—
Our touch can alter all created things,
We are everything on earth—except The Gods!

Variant translation: On our crowded planet there are no longer any internal affairs! ...
Nobel lecture (1970)
Context: I have understood and felt that world literature is no longer an abstract anthology, nor a generalization invented by literary historians; it is rather a certain common body and a common spirit, a living heartfelt unity reflecting the growing unity of mankind. State frontiers still turn crimson, heated by electric wire and bursts of machine fire; and various ministries of internal affairs still think that literature too is an "internal affair" falling under their jurisdiction; newspaper headlines still display: "No right to interfere in our internal affairs!" Whereas there are no INTERNAL AFFAIRS left on our crowded Earth! And mankind's sole salvation lies in everyone making everything his business; in the people of the East being vitally concerned with what is thought in the West, the people of the West vitally concerned with what goes on in the East. And literature, as one of the most sensitive, responsive instruments possessed by the human creature, has been one of the first to adopt, to assimilate, to catch hold of this feeling of a growing unity of mankind. And so I turn with confidence to the world literature of today — to hundreds of friends whom I have never met in the flesh and whom I may never see.
Friends! Let us try to help if we are worth anything at all! Who from time immemorial has constituted the uniting, not the dividing, strength in your countries, lacerated by discordant parties, movements, castes and groups? There in its essence is the position of writers: expressers of their native language — the chief binding force of the nation, of the very earth its people occupy, and at best of its national spirit.

Source: The Secret Garden

Interview with Euronews' Claudio Rocco in 2011; as quoted in " Science says 'ciao' to Italy's Margherita Hack: the 'lady of the stars'", euronews.com (1 July 2013) https://www.euronews.com/2013/07/01/science-says-ciao-to-italy-s-margherita-hack-the-lady-of-the-stars.