"Emperor Alexander was undoubtedly intelligent, but his intellect, subtle and penetrating, lacked depth. He was also easily led astray by a decided penchant for false theories. His favorite ideas always prevailed in his mind; he adopted them by sudden inspiration and gave himself over to them with the utmost ardor; soon they took such possession of him that his will was subordinated to those who instilled them."
January 1, 1970
https://en.wikiquote.org/wiki/Alexander_I_of_Russia