I don't - that's not what I said.Why do you think a subjective religious experience should be considered certain knowledge?
I said that it goes without saying that no human knowledge is "certain" given humans are not omniscient. One of the major points of philosophy as a discipline is to slay that pointless monster of skepticism - that "alas, humans are not omniscient and always fallible therefore I can know nothing ever" - to have a way of life and living that works for oneself. Certainty is neither possible nor required for knowledge. A gnostic - one who takes ownership of their own power of knowledge and the responsibility of discernment that goes with it - understands and practices this.
Whether or not the experience is considered "religious" is not relevant. Experience is experience. Knowledge is knowledge. The absence of omniscience applies to all human knowledge and experience equally. So too does the decision to take ownership of one's power of knowledge and experience and trust in oneself and one's judgements. In general, humans have three basic approaches to how they treat their experience and knowledge:
- Trust in one's experiences and make decisions for oneself
- Trust in someone else's experiences and let an authority make decisions for oneself.
- Trust in no one and avoid decision-making or remain noncommittal.