Swastik is one of the most important symbols in Hinduism, the other one being Aum. The Symbolic significance of Swastika is that it represents auspiciousness, peace and prosperity. It marks the onset of any Hindu ritual, whether it be a wedding, grah pravesh, Satyanarayan Katha and many more. It is marked over all the objects or Samagri as we know in Hindi.
‘Swasti’ in Sanskrit means ‘ May all be with you that you want’. To understand how and why the sign came into use, we need to go back in time during the beginning of the earth and the solar system. It is believed that there was an explosion and scattering of comets and meteors in the solar system, which today in the modern science is identified as the ‘Big Bang Theory’. As a result, the Earth and the other planets in the solar system were formed and the position of the sun was identified as there was energy in all directions of the system. It is said that this scattered energy was in the shape of ‘Swastik’.
Accordingly, Swastik Symbol was created to symbolize the ‘Sun’ or the Surya Deva as it was marked as the centre and the source of energy for the planets and because of sun the life existed on earth. The four arms of Swastika stand for four main directions: North, South, East and west and according to the Hindu Scriptures these directions were known as: Rig, Sama, Yajur and Atharva. It also symbolizes the four aims of human life called purusharthas in Sanskrit : Dharma, Arth(acquiring wealth), Kama( fulfilling desires), and finally comes Moksha( liberation from this earthly life).
This explains why we mark the beginning of every auspicious occasion with the Swastik symbol, as it is the mark of Creation.