Every house in Westeros has a motto. From the Lannister’s unofficial creed, “A Lannister always pays his debts,” to House Baratheon’s declaration that “ours is the fury,” these sayings are extremely important to each house’s identity. Though House Stark’s official motto — “Winter is coming” — serves as a warning from the North about the long and often deadly Westeros winters, they have plenty of other sayings, including one attributed to Ned Stark: “When the snow falls and the white winds blow, the lone wolf dies, but the pack survives.”
The Stark family, which splintered during the show’s first season, have suffered enormous trials and tribulations over the course of the series (as well as losing a few of their number), finally reuniting fully in season eight when Jon Snow returns to Winterfell. Before that, at the end of season seven — with Bran, Arya, and Sansa safely in control of their ancestral home — Sansa reminds Arya of this particular saying.
Audiences didn’t know it yet, but by the show’s end, Ned’s words have true. All of the Stark family, including the half-Targaryen Jon Snow, survive the bloody battles of the final season. Though they part ways during the series finale, they do so in a spirit of peace, not war.