Myths of the Norsemen From the Eddas and Sagas
Worship of Vali
Vali is god of eternal light, as Vidar is of imperishable matter; and as beams of light were often called arrows, he is always represented and worshipped as an archer. For that reason his month in Norwegian calendars is designated by the sign of the bow, and is called Lios-beri, the light-bringing. As it falls between the middle of January and of February, the early Christians dedicated this month to St. Valentine, who was also a skilful archer, and was said, like Vali, to be the harbinger of brighter days, the awakener of tender sentiments, and the patron of all lovers. 
Chapter XVII: The Norns
The Three Fates
The Northern goddesses of fate, who were called Norns, were in nowise subject to the other gods, who might neither question nor influence their decrees. They were three sisters, probably descendants of the giant Norvi, from whom sprang Nott (night). As soon as the Golden Age was ended, and sin began to steal even into the heavenly homes of Asgard, the Norns made their appearance under the great ash Yggdrasil, and took up their abode near the Urdar fountain. According to some mythologists, their mission was to warn the gods of future evil, to bid them make good use of the present, and to teach them wholesome lessons from the past.
By Permission of the Berlin Photographic Co., 133 New Bond St., W.
These three sisters, whose names were Urd, Verdandi, and Skuld, were personifications of the past, present, and future. Their principal occupations were to weave the web of fate, to sprinkle daily the sacred tree with water from the Urdar fountain, and to put fresh clay around its roots, that it might remain fresh and ever green.
“Thence come the maids
Who much do know;
Three from the hall
Beneath the tree;
One they named Was,
And Being next,
The third Shall be.”
The Völuspâ (Henderson’s tr.).
Some authorities further state that the Norns kept watch over the golden apples which hung on the branches of the tree of life, experience, and knowledge, allowing none but Idun to pick the fruit, which was that with which the gods renewed their youth. 
The Norns also fed and tenderly cared for two swans which swam over the mirror-like surface of the Urdar fountain, and from this pair of birds all the swans on earth are supposed to be descended. At times, it is said, the Norns clothed themselves with swan plumage to visit the earth, or sported like mermaids along the coast and in various lakes and rivers, appearing to mortals, from time to time, to foretell the future or give them sage advice.
The Norns’ Web
The Norns sometimes wove webs so large that while one of the weavers stood on a high mountain in the extreme east, another waded far out into the western sea. The threads of their woof resembled cords, and varied greatly in hue, according to the nature of the events about to occur, and a black thread, tending from north to south, was invariably considered an omen of death. As these sisters flashed the shuttle to and fro, they chanted a solemn song. They did not seem to weave according to their own wishes, but blindly, as if reluctantly executing the wishes of Orlog, the eternal law of the universe, an older and superior power, who apparently had neither beginning nor end.
Two of the Norns, Urd and Verdandi, were considered to be very beneficent indeed, while the third, it is said, relentlessly undid their work, and often, when nearly finished, tore it angrily to shreds, scattering the remnants to the winds of heaven. As personifications of time, the Norns were represented as sisters of different ages and characters, Urd (Wurd, weird) appearing very old and decrepit, continually looking backward, as if absorbed in contemplating past events and people; Verdandi, the second sister, young, active, and fearless, looked straight before her, while Skuld, the type of the future, was generally represented as closely veiled, with head turned in the direction opposite to where Urd was gazing, and holding a book or scroll which had not yet been opened or unrolled.
These Norns were visited daily by the gods, who loved to consult them; and even Odin himself frequently rode down to the Urdar fountain to bespeak their aid, for they generally answered his questions, maintaining silence only about his own fate and that of his fellow gods.
“Rode he long and rode he fast.
First beneath the great Life Tree,
At the sacred Spring sought he
Urdar, Norna of the Past;
But her backward seeing eye
Could no knowledge now supply.
Across Verdandi’s page there fell
Dark shades that ever woes foretell;
The shadows which ’round Asgard hung
Their baleful darkness o’er it flung;
The secret was not written there
Might save Valhal, the pure and fair.
Last youngest of the sisters three,
Skuld, Norna of Futurity,
Implored to speak, stood silent by,—
Averted was her tearful eye.”
Valhalla (J. C. Jones).
Other Guardian Spirits
Besides the three principal Norns there were many others, far less important, who seem to have been the guardian spirits of mankind, to whom they frequently appeared, lavishing all manner of gifts upon their favourites, and seldom failing to be present at births, marriages, and deaths.
“Oh, manifold is their kindred, and who shall tell them all?
There are they that rule o’er men folk, and the stars that rise and fall.”
Sigurd the Volsung (William Morris). 
The Story of Nornagesta
On one occasion the three sisters visited Denmark, and entered the dwelling of a nobleman as his first child came into the world. Entering the apartment where the mother lay, the first Norn promised that the child should be handsome and brave, and the second that he should be prosperous and a great scald—predictions which filled the parents’ hearts with joy. Meantime news of what was taking place had gone abroad, and the neighbours came thronging the apartment to such a degree that the pressure of the curious crowd caused the third Norn to be pushed rudely from her chair.