Final answer:
Beta Sigma Phi's first great lesson involves inviting into the community with humility and willingness to learn and experience what the fellowship offers, often starting during university recruitment events.
Step-by-step explanation:
The fellowship of Beta Sigma Phi and its first great lesson is about inviting into the community and entering with humility and willingness to experience what the community has to offer. Being a part of such a fellowship or sorority can be an enriching and transformative experience, which often starts during recruitment events like those held at universities. On sorority recruitment days, prospective members have the opportunity to learn about the different sororities and fraternities, their values, traditions, and the kind of fellowship they offer.