Youth mentoring organization pairing youth (Littles) and mentors (Bigs) of ALL beliefs to empower youth potential. Youth mentoring organization pairing youth and mentors of ALL beliefs to empower youth potential. Since 1925 Catholic Big Brothers Big Sisters' mission to the Los Angeles area has been to provide low-income, at-risk youth, of all beliefs and identities with strong, enduring and professionally supported, one-on-one relationships with caring adults that change the lives of these young people for the better; forever. Its vision is to create a lasting, positive impact on youth, helping them to succeed in school and in life.