"not from that which might, perhaps, possibly, materialize" meaning- he doesn't literally need to see it with his eyes- but if logic shows that something may occur it's saying that he can see it- he can see it in his mind, you can sense a likelihood of some sort of danger and possibly of being harmed by something, so then you should protect yourself but to make up fears that are senseless, is not a correct thing to do regarding the verse mentioned above, "the lazy man says, 'there is a lion on the road...,"'