Ephesians 1:18

having the eyes of your hearts enlightened, that you may know what is the hope to which he has called you, what are the riches of his glorious inheritance in the saints,

-Ephesians 1:18

Paul continues to pray for his readers.  Now, he requests for them "having the eyes of your hearts enlightened".  This is quite similar to the earlier request, but it is still somewhat separate.  What's interesting is that AMP notes this, "the eyes of your hearts [the very center and core of your being] may be enlightened [flooded with light by the Holy Spirit]".  So, I guess he's praying that "the very center and core of your being be may be flooded with light by the Holy Spirit".  Still, I am not entirely certain what this means.  Fortunately, Paul tells us three reasons or purposes for this, which helps us in understanding what he means.

The first reason for what Paul is praying for here in verse 18 is, "that you may know what is the hope to which he has called you".  To be flooded with light by the Holy Spirit is to or results in knowing the hope of his calling.  AMP describes the hope as "[the divine guarantee, the confident expectation]".  Paul is addressing believers and believers are ones who have been bought and have been "sealed with the promised Holy Spirit".  This hope is very much tied to the gospel and our trust in what God says.

The second reason for what Paul is praying for here in verse 18 is, "(that you may know) what are the riches of his glorious inheritance in the saints".  I would almost think this is referring to an inheritance that we receive.  It isn't wrong to say that we receive an inheritance and things like that.  However, this is referring to "his glorious inheritance in the saints".  The riches that God inherits is the saints.  I am still unsure, but I think that's what Paul's referring to.  When flooded with light by the Holy Spirit, we will come to know this glorious inheritance of God.  God is in a sense receiving this inheritance and I'm assuming God wants it and delights in it.  Followers are valued and seeing God's delight in them is something we will come to know more fully.

Y'know, maybe I'll leave the third one for later, especially since it spirals off to more things.  In any case, we see this "knowing" that Paul desires we receive as a result of "having the eyes of your hearts enlightened".