Discernment Regarding Cults and Charismatic Leaders

When Brooke shares her some of her story she tells about her experience of getting involved in a cult and giving away all her money. I know even intelligent, logical people can be vulnerable to such organizations. I am curious if she has any advice on how to discern if an organization is actually a cult. I know I have been influenced in the past by charismatic leaders and made regrettable decisions. I am trying to use my brain to make decision that will serve me well!