"It shouldn't take a fool to see that I believe". Trying to understand this phrase from Iron Maiden's song. I can't catch the meaning of it. It shouldn't be "No need to be fool to see that I believe" or should it?
It shouldn't take a ladder to see over the hedge.
take = require.
The hedge is not so tall that a ladder would be required in order to see over it.
The relationship of ladder here to hedge is clear. A hedge can have height. Ladders allow us to climb to a height.
However, in your quoted lyric, we can only guess at the relationship between fool and believing, and it doesn't take a genius to see that guessing would be off-topic for this site.