These verses are part of Paul's description of how he was constantly praying for the Ephesian church (Ephesians 1:15-21). Having given thanks for their faith and fellowship love (Ephesians 1:15), and asked Father God to reveal Himself to them more so that they might get to know Him better (Ephesians 1:17), Paul now prays that the Ephesian believers would develop good spiritual 'long sight'. In talking about the 'eyes of the heart', the Apostle is referring to our deep desires which set the agenda for our lives.