Benefits of memorizing scripture

So I'm rereading through the topical memory system, and the very beginning goes over some points that are worth noting.  

Here are a few things the book mentions scripture memory can help with:  Overcome worry, victory over sin, confidence in witnessing

I don't know about everyone else, but those items right there are enough to get my interest.  But the book goes on to mention what the system is for.  It helps memorize and meditate on scripture effeciently, apply the verses to life, review the verses to be able to recall them later, and continue memorizing beyond the verses covered.  

The system groups verses by topic so they can be recalled by thinking of the topic the verse speaks of.  The verse I picked to start with Eph 4:11-12 isn't actually part of this.  I may start with the system's verses tomorrow.  It recommends a pace of two verses/week.  which I thought was hard, but it really isn't that bad.

So what topic does Eph 4:11-12 refer to.  "And He gave some as apostles and some as prophets, and some as evangelists, and some as pastors and teachers, for the equipping of the saints for the work of service, to the building up of the body of Christ."  Eph 4:11-12  

One of the topics listed in the system is "Be Christ's Disciple" which I feel is a good fit for this verse since it deals with equiping and using our gifts.  So according to the system you are to say the topic, reference, verse, reference.  So...

Be Christ's Disciple

Ephesians 4:11-12

And He gave some as apostles, and some as prophets, and some as evangelists, and some as pastors and teachers, for the equipping of the saints for the work of service, to the building up of the body of Christ.

Ephesians 4:11-12