Rajat: Kya mnushya janam ek baar hi milta hai yan baar baar bhi mil skta hai?
Swami Ram Swarup: Manushya janam karmon ke adhaar par hota hai. Jub paap aur punnya baraabar hotey hain tub manushya janam milta hai. Jub punnya zyada hotey hain aur paap kum hote hain tub bhi manushya janam milta hai. Isliye maunshya janam karmanusaar upar ke niyam se baar-baar bhi milta hai. Iske liye hamein paap nahin karne chahiye. Jub hamare paap zyada ho jayenge tub hamein manushya janam nahi milega. Hamein ved marg par chalkar jeevan ke mukhya lakshya jo Moksha hai usey paa lena chahiye.

Varun: Namaskar Maharaj ji. My question is that what is the use of wearing janaeu?
Swami Ram Swarup: Namesteji. In this regard, I paste my article as under-

Janeyu (the holy thread)

According to the true Vedic philosophy the custom to wear the Janeyu is eternal made by God. Janeyu has three threads which are indication of Raj, Tam and Satv gunas. There is a knot in the thread which indicates and reminds every time that we have taken oath to bind the said three gunas because the gunas have proud, anger, laziness, greed and various sins.

Further the said three threads also remind us to discharge duties towards Rishirin, Pitririn and Devrin. Rishirin means we have to serve the learned Rishis to obtain knowledge both worldly and spiritual. Pitririn means after completion of brahmacharya ashram our parents entered Grihasthashram (family life being married) and gave us birth. This tradition we have to follow and we have to serve the parents also. Devrin means after completion of grihasthashram we have to enter Vanprasth ashram to learn and donate the knowledge to the society. In a Sanskrit shlok it is mentioned that the Yajopavit gives us long happy life.

Rules for Janeyu

Janeyu is also called Yajopaveet. It is worn generally, at the age between 6-8 years while performing upanayan or Vedarambh sanskar. However, everybody can wear it after performing Holy Yajyen from Ved mantras. In the Yajyen, a learned acharya (Brahma) must preside over it. According to the true Vedic philosophy the custom to wear the Janeyu is eternal made by God. Janeyu has three threads which are indication of Raj, Tam and Satv gunas. There is a knot in the thread which indicates and reminds every time that we have taken oath to bind the said three gunas because the gunas have proud, anger, laziness, greediness and various sins.

After wearing janeyu, one must always be vegetarian, he must do daily havan with gayatri mantra. He must chant daily gayatri mantra and name jaap of holy name of God – Om sitting on siddhasan or Padmasan along with its meaning, daily. He should try to listen Vedas. You may please contact local Arya Samaj on the subject or you may come here.