Siman 111

(8.) He would frequently tell of his thoughts from the time of his youth, when he was occupied in his service of G-d. For he pictured in his mind that he did not want to become famous in any way at all, and he did not want to receive [followers] at all, and he had many many thoughts about how he would conceal himself from the world and how he would manage his livelihood. And sometimes he had thoughts that he would go begging from door to door and no one would know who he was.