Threading ceremony, Munj or vratbandhan as you may like to call it, is one of the traditional ceremonies performed on a student who has to leave his parents house and enter Gurukul. This process is also know as “Bhramcharya”, and person enters bhramcharya ashram.
Gurukul is the place where one can learn teachings from the guru(teacher). In historic days the students use to go to gurukul at the age of 8 years and this ceremony was performed which indicated the start of formal education and other skills. The munj ceremony is performed from the age of 8 years to 11 years of age commonly. The student then uses to stay in the gurukul for many years. During the ceremony the boy receives a holy thread which symbolizes three trinities of goddess – saraswati, lakshmi and parvati. As per Hindu religion a human is born twice, once through his mother’s womb and the other is the intellectual birth.
First of all let me clear one point, Janeu is used by Brahmins, Kshatriya as well as Vaishya. In present day scenario, as well as older Vedic era. Texts such as the Baudhayana Gryha Sutra encouraged all members of society to undertake Upanayana rite of passage, including the Sudra. Therefore it is not restricted to Brahmins only.
Upanayana (उपनयन) literally means “the act of leading to or near”.It is a ceremony in which a Guru (teacher) accepts and draws a boy towards knowledge and initiates the second birth that is of the young mind and spirit.
In a nut shell, it is the formal introduction of the child towards his education and learning period. A verse from Baudhayana Gryha Sutra describes all the points sated above:
“Let him initiate [to school through Upanayana] a Brahmin in spring, a Kshatriya in summer, a Vaishya in autumn, a Sudra in the rainy season; or all of them in the spring.”
—Baudhayana Gryha Sutra
One feels steady that the god always with me in form of Janeu, I am the offspring of god. Janeu symbol of god existence with holder(who holds Janeu) which inspires a man to avoid misdeeds.
When a man goes for urine or latrine ,he hangs and folds Janeu over the right ear.
There is a blood vessel named Lohitika on right ear, it is pressed by Janeu, it helps to release urine or latrine freely and reduces the diseases related to them.
AGE OF INTRODUCTION
According to the Hindu scriptures the following age is considered as eligible:
A Brahmin boy should be 5 or 8 Years .
A Kshatriya boy should be 6 or 8 years.
A Vaishya boy should be 8 or 12 years.
If the yagyopavit/upnayan sanskaar is not observed at the age stated above, then the maximum age limit stated by the various hindu scriptures is 16,20 and 24 years respectively for the Brahmin, Kshatriya and the vaishya boy.