In college I began to attend Divine Liturgy at the Byzantine (Ukrainian Catholic) parish near our home for different reasons. "Why?" everyone asked me. The answer follows here:
"All should realize that it is of supreme importance to understand, venerate, preserve, and foster the exceedingly rich liturgical and spiritual heritage of the Eastern Churches, in order faithfully to preserve the fullness of Christian tradition..."
Vatican Council II: Unitatis Redintegratio, number 15.