How did the muslims build the successful arab empire
short answer

Well the short answer is, unlike the christians who would force conversions, the muslims were very tolerant of other conquered peoples and allowed them to continue practicing their beliefs as long as they paid a tax 

the two sets of lines are :

and remember beauty,five-wits,strength,and discretion ,they all at the last do everyman forsake (to leave forever ) for after death amends may no man make,for then mercy and pity doth him forsake.(to leave forever )

It gets more wisdom and they know more knowledge