وَقَالَ (عليه السلام):
Amir al-mu'minin, peace be upon him, said:
رَسُولُكَ تَرْجُمَانُ عَقْلِكَ،
Your messenger is the interpreter of your intelligence
وَكِتَابُكَ أَبْلَغُ مَا يَنْطِقُ عَنْكَ.
while your letter is more eloquent in expressing your true self.