The rebbe occupies a unique position in the Hasidic Community. He is in every way the leader of his flock and that fact is central in the organization of the group and the dynamics of change within it. His followers turn to him for advice not merely on spiritual and ethical problems but also on a wide range of practical matters such as taking a new job, moving to another city, or even consulting a physician. Because he is believed to be a tzaddik —a righteous person—possessing special qualities of insight, he is viewed as a mediator between his followers and God. In addition to seeking a personal audience with him, the Hassid may also send a kvitl, or prayer note, to the rebbe requesting his advice and blessing. It is common for Hasidim who are geographically distanced from their rebbe to visit him particularly during religious holidays. A rebbe's authority is inherited from his father or some other close relative but is believed ultimately to come from God. Perceived by his followers as unable to do wrong, it is impossible to have a disconfirmation of the rebbe's advice.