Truth attracts those who would distort it as way to benefit themselves. Jesus encountered such false prophets. Heresies were a scourge upon the church as it grew through the ministry of the disciples, Paul, and other leaders during the first century. To counter this, the Creed took form, first as a proclamation during baptism. By the middle of the third century, under the care of wise leaders, it had grown into the more complete set of statements used widely, and we do mean w-i-d-e-l-y, ever since. It is neither Scripture nor a substitute for Scripture--it may be thought of as a list of "don't ever forget these facts."
Yet it is more than that, for it gives us a way to affirm the essential truths of our belief and of our relationship with God. Used prayerfully, it deepens understanding, screens out false doctrine, and encourages devotion.