Our shastras conclude that the life of a human being is the best form among all the living beings. Shri Tulsidas ji says in Shri Ramchartimanas:
|| कबहुक करि करुणा न र देही,देत ईश बिनु हेतु सनेही ||
In Our Sanatan Paddhati describes that we get the physical body of a human being only when the Parmatma showers his mercy on us.