What the Bible says about God Knows Our Strengths
(From Forerunner Commentary)
God severely chastens him, but at the same time, He provides Moses with Aaron. God must have known that Moses would react this way, as He had already put it into Aaron's mind to be on his way. God knows us well, inside and out. He knows our heart, our inclinations, our weaknesses, our strengths. It is easy to see how He supplies Moses' needs all along the way so that His servant can do the job. Will He will deal any differently with us? No, He will likewise always supply what we need.
What a change occurs in Moses during those forty years! The hesitant and restrained Moses at the age of eighty is a far better man for God's purpose than the impetuous one at forty.
John W. Ritenbaugh
Conviction, Moses, and Us