I have a logo, isn’t that my brand?Your logo is one visual component of your brand, but it is not your brand.

Your logo is to your brand like a signature is to a personality.  Each is unique and identifiable, but a signature alone can not tell you about the character, personality and attitude of a person.  You can no more learn how intelligent Albert Einstein was from his signature than you can learn how capable a company is by the logo on a business card.