Some similes join a visible scene to an ethical or intellectual meaning. The intended visual structure is not directly present on both sides, yet imagination and interpretation allow the mind to construct a corresponding image.
A night sky filled with scattered stars is visible. Sunnah and innovation are not literally coloured bodies. Nonetheless, their metaphorical treatment as brightness and darkness can produce an intelligible correspondence.
Imaginative resemblance is not a defect. The comparison fails only when the proposed common meaning can be found neither in actuality nor through a coherent imaginative interpretation.