The "Filioque"

I'm not going to pretend to understand all the arguments Orthodox and Latins make about whether you say in the Creed, "I believe in the Holy Spirit...Who proceeds from the Father," or "from the Father and the Son" (Latin filioque, pronounced feel-ee-OH-kway). But what cinched it for me was when it was pointed out that "Who proceeds from the Father" is a direct quote from John 15:26, which does not go on to say "and the Son." I'd never realized that as a Catholic, or even as a Protestant. You can't beat the testimony of Christ Himself!