The Sangha is precious in Buddhism as without the Sangha the religion could not establish, spread and grow till today. The sangha show that it is possible for us to practice the Dharma and become enlightened. Their moral actions also inspire us and we can seek for their advice in the spiritual path as well.
Here is
The meaning and significance of Sangha from
http://www.buddhanet.net/cmdsg/getting5.htmThe Sangha forms the
third component of the Triple Gem. Sangha members represent the embodiment of the Dhamma and they have been, by and large, responsible for the preservation and promotion of the religion, both during and after the time of the Buddha.
Two months after his enlightenment the Buddha began his teaching mission by delivering the first sermon, called the Dhammacakkappavattana Sutta, to a group of five ascetics, who were his former associates. They were Kondañña, Vappa, Bhaddiya, Mahanama, and Assaji. At the conclusion of the discourse, Kondañña is said to have attained the "Eye of Truth," i.e., realized the Dhamma and achieved the first of four stages of transcendent spiritual attainment. With that, the Sangha came into being, bringing to completion the Holy Triple Gem. This happened on the full moon day of the month Asalha (eighth lunar month).
Literally, Sangha means community. In its broadest sense, the term covers both the lay and the monastic communities.
From the doctrinal perspective, it refers to those who have achieved any of the four stages of transcendent spiritual attainment. Such Sangha members are known as 'noble disciples' (ariyasangha). Technically, these are called Sotapanna (Stream Enterer), Sakadagami (Once Returner), Anagami (Non-Returner), and Arahanta (Worthy One). These noble disciples constitute the Sangha of the Triple Gem; they are Sangha by virtue of their special attainments. Thus anyone who has attained to that higher level is qualified to be included in this category of Sangha.
From the perspective of the Vinaya (Discipline), Sangha refers to a community of monks (bhikkhusangha), specifically a group of four or more monks, who are required to be present at certain ecclesiastical rites where a quorum of monastic members is needed. This is the Sangha according to the Vinaya definition, but not necessarily as part of the Triple Gem. Thus there are two categories of Sangha, namely, Noble Sangha and Conventional Sangha. Of course, individual monks may belong to both if they are so qualified. Kondañña and his colleagues, and many of their contemporaries, were some of these noble monk disciples.
However, because the role of the monks is so distinct and prominent, the term Sangha is often used exclusively in reference to the community of monks and does not cover the laity as in its broader sense. In the Theravada tradition, especially, this term is never used in connection with the lay community.
When Kondañña gained the Eye of Truth, he became the first member of the Noble Sangha. When he was ordained a monk, he became the first member of the Conventional Sangha. Thus, the conclusion of the first discourse marks the beginning of the Noble as well as the Conventional Sangha of disciples.