Is the sentence 'I have neither soul nor eyes' correct or should I say 'I have neither a soul nor eyes' instead?

Both sentences are grammatically correct, but they convey slightly different nuances. "I have neither soul nor eyes" has a more poetic or formal tone, while "I have neither a soul nor eyes" is more straightforward and commonly used in everyday language. You can choose either based on the context and tone you wish to convey.