Agni Purana 336.3

336.3

abhidhāyāḥ pradhānatvāt kāvyaṃ tābhyāṃ vibhidyate /
naratvaṃ durlabhaṃ loke vidyā tatra ca durlabhā //

Because of the primacy of literal expression, poetry differs from both of those.
Human birth is rare in the world, and learning there is rare;