Properly speaking we dont actually perceive things with our senses. We see, hear, smell, feel, and taste things with our brains, not with our eyes, ears, noses, nerve endings and mouths. Those body parts are merely the conduit by which the things sensed are conducted to the brain, where they are made intelligible and acted upon. So, sure, we can say everything is conceived, which makes the term perception redundant, or we can say the brain perceives things, which is essentially the same. And science does of course rely on faith, a series of causes and effects that up till the last occurrence have always been proved true, which is not to say the future will be like the past.
But as this discussion is taking place in a religious forum it is difficult to avoid thinking the point of the OP was to argue that if everything we understand about the world comes down to faith then there is no substantive difference between having faith that the sun will rise tomorrow morning and faith in a deity. There is, literally, a world of a difference. To employ the term reality is to accept that there is such a state, for by questioning reality we are acknowledging it. But although we cannot without self-contradiction deny reality we accept that it is without certitude. Objects exist but they dont have to exist. The sun exists and while it neednt exist it has nevertheless risen every morning in the past, which give cause for us to believe it will continue thus in the future. So there is no contradiction in saying the sun will not rise tomorrow morning we but we descend into the realms of absurdity if we say there never was any such object. We believe the sun exists and that deciduous trees lose their leaves in winter because that is reality, while faith in deities has no direct correspondence with what is real but only with what is imagined. We may not understand the world but were all agreed that there is a world, whereas mystical beings are another matter entirely.
But as this discussion is taking place in a religious forum it is difficult to avoid thinking the point of the OP was to argue that if everything we understand about the world comes down to faith then there is no substantive difference between having faith that the sun will rise tomorrow morning and faith in a deity. There is, literally, a world of a difference. To employ the term reality is to accept that there is such a state, for by questioning reality we are acknowledging it. But although we cannot without self-contradiction deny reality we accept that it is without certitude. Objects exist but they dont have to exist. The sun exists and while it neednt exist it has nevertheless risen every morning in the past, which give cause for us to believe it will continue thus in the future. So there is no contradiction in saying the sun will not rise tomorrow morning we but we descend into the realms of absurdity if we say there never was any such object. We believe the sun exists and that deciduous trees lose their leaves in winter because that is reality, while faith in deities has no direct correspondence with what is real but only with what is imagined. We may not understand the world but were all agreed that there is a world, whereas mystical beings are another matter entirely.