It would be to define the essay's purpose.
By definition, a business letter is used by employees and clients of different companies as a form of communication with regards to their agenda. In addition, it mainly comprises of tones having a much formal use of language. Proper formats must be observed in making these kind of letter such as avoid indenting when using a block format.
I believe that it means we never know our full potential, and that we never know how great we are till we are asked to show it.
I blame you (with a passive voice)
