– Nobody needs me!!! Nobody! Absolutely nobody!
– Have you asked everyone?
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"Fours", according to the Kabbalah, represent nature and all things natural, simple forms.
Swords are will, action, thought, information.
Thus, the Four of Swords is a simple, natural, "innate" action, thought, or impulse.
For example, it may symbolize instincts and many unconditional reflexes.
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For reference:
In order for a living creature to survive as a species, it's endowed with a number of unconditional reflexes [323 - https://en.wikipedia.org/wiki/Reflex (https://ru.wikipedia.org/wiki/%D0%A0%D0%B5%D1%84%D0%BB%D0%B5%D0%BA%D1%81_(%D0%B1%D0%B8%D0%BE%D0%BB%D0%BE%D0%B3%D0%B8%D1%8F))]and instincts at the genetic memory level[324 - https://en.wikipedia.org/wiki/Instinct (https://ru.wikipedia.org/wiki/%D0%98%D0%BD%D1%81%D1%82%D0%B8%D0%BD%D0%BA%D1%82)].
Their list is quite extensive and differs from species to species.
Let's take humans, for instance.
Unconditional reflexes include:
1)
Breathing. Even while sleeping or unconscious. Essential for survival.
2)
Holding your breath. Essential for survival when submerged in water.
3)
"Searching"
[325 - https://en.wikipedia.org/wiki/Primitive_reflexes (https://ru.wikipedia.org/wiki/%D0%92%D1%80%D0%BE%D0%B6%D0%B4%D1%91%D0%BD%D0%BD%D1%8B%D0%B5_%D1%84%D0%B8%D0%B7%D0%B8%D0%BE%D0%BB%D0%BE%D0%B3%D0%B8%D1%87%D0%B5%D1%81%D0%BA%D0%B8%D0%B5_%D1%80%D0%B5%D1%84%D0%BB%D0%B5%D0%BA%D1%81%D1%8B)]
and sucking. Essential for searching out the mother's breast and sustenance. Essential for survival.
4)
Digestion, or, rather, preparation for it, when the appearance or smell of food is detected. Necessary for the timely activation of the complex inertial processes involved in digestion: salivation, the production of gastric juice, etc.
5)
Pain. Essential for a quick response, enabling people protect themselves in life-threatening situations.
6)
Balance. Necessary for us, upright-walking apes.
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And many other, in essence, basic survival reflexes.
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Instincts:
1)
Fear of heights. If it's absent, babies fall.
2)
Fear of snakes and spiders. If it's absent, infants and children may die from the bites of poisonous snakes and spiders.
3)
Babies crying. Essential for survival, as the most basic form of communication between infant and parent. "The squeaky hinge gets the oil".
4)
The herd instinct. Helps weaker individuals survive.
5)
Curiosity. Essential for learning.
6)
Discovery and exploration. Necessary for the acquisition of new territories and resources. And, hence, survival.
7)
Hygiene. Essential for survival. Including, among things, for sex appeal.
8)
Reproduction. Sex appeal. Necessary for continuation of the species, the genus.
9)
Dominance/submission.
[326 - In essence, this is an instinct of either accepting or rejecting personal responsibility. (Muse)]