وذلك الاشتراك يكون تحقيقاً أو تخييلاً
That participation may be actual or imagined.
In actual (taḥqīqī) participation, the intended quality belongs to both terms in the relevant way; it need not be invented merely for the expression. Two flowers, for instance, may genuinely share a similar colour.
In imagined (takhyīlī) participation, imagination or an apt interpretation supplies a composite feature that is not literally present in both terms in that form. This is not meaningless invention; it makes an intellectual or abstract concern vivid through a sensible scene.