"The eyes of your understanding being enlightened; that ye may know what is the hope of his calling, and what the riches of the glory of his inheritance in the saints." (Ephesians 1:18).
As a Christian, you must strive to attain the manifestation of your perfection in Christ Jesus. This is the primary calling of all Christians.
On this journey, one of the main things you need to concentrate on is your level of spiritual understanding.
The higher your level of spiritual understanding, the deeper the truths you can accumulate in your spirit. Revelation is progressive. There are truths for babies and truths for matured Christians. Therefore, you must grow in understanding so that you can digest and absorb the deeper mysteries of the kingdom into your spirit.
That is what our opening scripture says; that the eyes of your understanding will be enlightened. It means the eyes of your heart will be flooded with the light of God.
When the eyes of your understanding is enlightened, you'll be able to comprehend deeper truths of the kingdom. Without such truths, you'll continuing acting like a babe in the kingdom.
Just like in the natural there are certain information you won't give to your 2 year old child, the same way God will only reveal things to you according to your level of spiritual understanding.
Therefore, each and everyday, one of your prayer topics should be that God will enlighten the eyes of your understanding. When you begin to pray this, you'll marvel at how much your whole life will change for the better.
God wants you to grow from being a babe in understanding, thrown about to and fro by any wind of doctrine and the systems of this world. You were created to be a master over creation!
Grow in spiritual understanding!