at facts and ideas can never observe a causal relationship between perceptions and external things as perceived because the mind only can know perceptions filtered through the senses.
Men still entertain a strong propensity to believe that they penetrate farther into the powers of nature, and perceive something like a necessary connexion between the cause and the effect. When again they turn their reflections towards the operations of their own minds, and feel no such connexion of the motive and the action; they are thence apt to suppose, that there is a difference between the effects which result from material force, and those which arise from thought and intelligence.
Hume believed all knowledge is ideas or impressions and that our minds are only a collection of our perceptions. He believed there is no knowledge other than that which is directly observable (via our sensory impressions), which is why he believed that God, for example, is only one idea in our minds. Therefore, God does not exist in reality. He believed that since we cannot use ration to verify substance of causal activity, then all we can do is infer based on a probability that is the product of our perceptions. David Hume’s main contention is that the most common kind of human reasoning, inductive reasoning where we infer things from a series of events, is not reasoning at all.
Instead, Hume postulated that it was one of habit and expectation. Since we never really experience the phenomena of cause and effect, we can never know the relationship between them through reason. In this manner, we cannot reason that God exists, for
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