Joannicius the Great was born in Bithynia in the year 752 in the village of Marikat. His parents were destitute and could not provide him even the basics of an education. From childhood he had to tend the family cattle, their sole wealth. Love for God and prayer completely dominated the soul of the child Joannicius. Often, having shielded the herd with the Sign of the Cross, he went to a secluded place and spent the whole day praying, and neither thieves nor wild beasts came near his herd.