Is not God the Author of all goodness, righteousness and holiness? Do we not trust that He is at all times doing everything to save as many as He can? Then we should certainly give God the benefit of the doubt in all things and account to ourselves the lack of understanding.
Here is something I received in an e-mail yesterday. It could easily apply as a reason why we can't always understand everything in Holy Scripture:
From St. Isaac the Syrian.
"If God is slow in answering your request, and you ask but do not promptly receive anything, do not be upset, for you are not wiser than God.
"When you remain as you were before, without anything happening, it is either because your behaviour is not worthy of your request, or because the paths in which your heart was traveling were far removed from the aim of your prayer, or because your interior condition is far too childish, when compared with the magnitude of the thing for which you have asked."
It is not how much we study, but for what purpose we study. God gives gifts to some and not to others according to His wisdom and what He sees in our hearts. Why stumble over as small a passage and this one, not even something that we could apply to help us achieve humility or some other virtue?