CC Ādi 3.99

āpani śrī-kṛṣṇa yadi karena avatāra
āpane ācari’ bhakti karena pracāra
Synonyms: 
āpani — Himself; śrī-kṛṣṇa — Lord Kṛṣṇa; yadi — if; karena — He makes; avatāra — incarnation; āpane — Himself; ācari’ — practicing; bhakti — devotional service; karena — does; pracāra — propagation.
Translation: 
[Advaita Ācārya thought:] “If Śrī Kṛṣṇa were to appear as an incarnation, He Himself could preach devotion by His personal example.