Not all religious systems are based on faith. It seems to me that the faith aspect of some religions is a side effect of the fact that religion is motivated by

Not all religious systems are based on faith. It seems to me that the faith aspect of some religions is a side effect of the fact that religion is motivated by a desire to explain and/or celebrate human purpose. To logically argue that (human) purpose is fundamental is a difficult thing to do, and as a result many religions are illogical and are based on faith. But there are many varieties of religion that don't rest on miracles. For example mysticism is a religion that is not based on dogma, but is a purely biological religion, in which understanding of purpose is derived from first-hand phenomenological experience (as most people who have taken LSD or reached some level of expertise in meditation can attest to). Sure, some mystics make stupid dogmatic statements and unfalsifiable claims related to these experiences, but that's just guilt by association. The Singularity could be another example of a religion, in this case a religion in which purpose is derived from a sense of the inevitable progress to a valorized endpoint (the "Point Omega" is what Teilhard de Chardin, the Catholic mystic and biologist termed it, and some Singularity-ists have adopted his terminology). It is not based on faith but on reasoned logic (which very well could be wrong), but the very zeal and the way in which human purpose is derived from it are enough reason to call it a religion. One problem with this type of discussion is that religion is sometimes subject to the same kind of moving target definition that AI is subject to. If a philosophical system that was considered religious becomes viable/practical, it is defined out of being a religion? I myself look forward to the day when all religions are based on ideas that work, rather than belief in miracles.