In the hands of the Spanish Inquisition at that time, Teresa's "Life" was commonly believed to be the weight in the scale of whether to call her experiences heretical or not. Her humility and claims that "I am not meant for writing; I have neither the health nor the wits for it" almost prevented Teresa from composing "The Interior Castle". However, according to a letter written by Fray Diego, one of Teresa's former confessors, Teresa was finally convinced to write her book after she received a vision from God. Diego wrote that God revealed to Teresa: