The Prophet married Aisha primarily for three reasons: To reinforce the friendly relations already existing with Abu Bakr (his closest companion). To educate and train Aisha so she may serve the purposes of Islam. To teach her to utilize her capabilities for the sake of Islam.
Aisha (R) was known for her formidable memory in her youth.
So far as the Hadith or sayings of the Prophet is concerned, Aishah ? is one of four persons (the others being Abu Hurrah, Abdullah ibn Umar, and Ana ibn Malik) who transmitted more than two thousand sayings.
It was the aforementioned qualities of Aisha ? and the Prophet%u2019s guidance in molding these capabilities for the service of Islam, were the main reasons, why the Prophet Married young Aisha ?, and not the perverted reasons brought forth by misguided orientalists.