The freedom of discussion which sacramental unity permits can feel dangerous and unboundaried. It takes getting used to. Since the 16th Century, Anglicans have recognized a three-fold basis for authority governing belief and practice. Its three elements are Scripture, Tradition, and Reason. Tradition is the history of the Church's interpretation of the Bible.
Tradition is deeper than mere custom.
Reason is the evidence of the Holy Spirit's ongoing ministry to the Church as it adapts to changing circumstances, to new knowledge, to fresh challenges. Reason is not limited to formal logic. It includes the fruit of Christian experience and the testimony of the Holy Spirit to the prayerful conscience. Episcopalians resolve issues of belief and practice by struggling together prayerfully until Scripture, Tradition, and Reason line up together. Basing a position on the one element that yields the answer you like best, disregarding the others, is considered irresponsible.