Su - Well, good + asti - to be
In Sanskrit, Suastika means 'well being'. (Clockwise motion)
Swa- destruction by fire + asti- to be
The paradoxical existence as anti- matter in the void(counter clock motion)
Suastika/Swastika is an equilateral cross with its arms bent at right angles, either facing left or right.
The symbol is more than 3,000 years old. It is found in many cultures through out the world. In Hopi civilization it represents the progressive sun and life in well being in clock wise motion.
In the Indus valley civilization the Suastika seal (clockwise motion) was a permit to exit the city during day, while the Swastika seal(counterclock wise motion) was a permit to enter after sunset.
In Hinduism, it is associated with the 'Vishnu Chakra' on the right forefinger of Lord Vishnu as symbolic of the macro-cosmic spiral galaxy in constant progressive in expansion in clock wise motion .
The counterclockwise motion swastika to evoke the 'shakti' is unfortunately erroneously used by modern neo pandits without knowledge of the true significance of the type of Suastika to be used in aspicious occasions in marriages or rituals. The counter clock wise motion Swastika is used by tantrics in rituals of sacrifices to appease 'shakti'.
Hitler too selected the tantric aryan counter clock wise motion Swastika to evoke 'power & destruction' by the tantric rituals of human sacrifice to gain power by destruction.
The Semi voluntary force:
This is a status quo maintaining force and thus it keeps the muscle tone of the body within two limits. The graph of variation of muscle tone would be in the form of a s-shaped wave or a mirror image shaped sinusoidal wave .
Vishnu is symbolic of this force and thus he is supposed to be the preserver.
The Muscles of facial expression:
Extending from each angle of our mouth are two pairs of muscles.
The vertical pair is associated with sensation (Pleasure and displeasure) and the horizontal pair with movement (Fear and anger). The two pairs thus cross each other at the angles of our mouth.
Pleasure is a positive emotion and thus it increases the muscle tone of our body from 50% to 100%. Displeasure, being a negative emotion, reduces the muscle tone from 50% to 0%. Thus, together they produce an s-shaped or sinusoidal wave.
For the same reason, motor emotions too produce an s-shaped wave.
If we draw an s-shaped graph horizontally and another vertically, with a common center, what we get would be a Suastika.
The center of the Swastika corresponds to the angle of our mouth. There are two Swastikas corresponding to the left and right of our mouth. Each Swastika is the mirror image of suastika .
Thus, Suastika is symbolic of control of emotions and means 'well being'.