Samvatsar (year) is also the 'Supreme Father' (Prajapati) and Samvatsar has two ayanas i.e. two paths - Uttarayan (When the Sun travels from Capricorn to Gemini while moving towards the north) and Dakshinayan (once the sun reaches north, it begins moving south and is called Dakshinayana – the sun is moving towards south. This causes seasons which are dependent on equinoxes and solstices). And, those who worship 'Ishvara' by offering oblations in Kupadi (the mining in which minerals are obtained by digging or making holes in the earth) and Yagyas, and consider all this as good deeds, they conquer the lunar heaven-worlds only; These are the people who come back to the world of birth. That is why sages who have not renounced the desire to have a son, follow the Dakshinayana path, which is the Pitriyana (path of the ancestors). And this too 'Rayi' (Jadatattva) is 'Naritattva'.