text: The translators thought, reasonably, that there could be different ways to use the Creed: there are times when we use it to make a personal statement of faith; there are other times when it is perhaps more appropriate to make a shared statement of faith.
  
  Your remark "I can only speak to what I believe ..." sounds reasonable in purely human terms. However, the Church doesn't understand faith in purely human terms. Part of the the theology of faith is about it not being "my faith" but "the faith of the Church in which I share". Understanding it that way seems to me to be expressed by saying "we ..."