The late 18th century saw the rise of "starchestvo" under Paisiy Velichkovsky and his disciples at the Optina Monastery. This marked a beginning of a significant spiritual revival in the Russian Church after a lengthy period of modernization, personified by such figures as Demetrius of Rostov and Platon of Moscow. Aleksey Khomyakov, Ivan Kireevsky and other lay theologians with Slavophile leanings elaborated some key concepts of the renovated Orthodox doctrine, including that of "sobornost". The resurgence of Eastern Orthodoxy was reflected in Russian literature, an example is the figure of Starets Zosima in Fyodor Dostoyevsky's "Brothers Karamazov".