This is what the Father and Son wants us to get from the Spirit in 1: 17. I read this and thought of what Adam and Eve gave up in the Garden for some grapes or figs or whatever fruit you think it is.

Verse 18 – 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, (KJV)

• Being enlightened, pephotismenous G5461. To give light is a good thought for this word.
• Eyes, ophthalmous G3788.
• Heart, cardias G2588. In the Greek text, understand is the word – cardia or heart. (Why we study.)
• To know, eidenai G1492. (Interlinear) These two references are saying different words.
• Comprehend, Oida G1492. (Mounce) ᾔδειν is actually a pluperfect form functioning as an aorist. This is an action that is completed and has no time reference. Yes, this is above my pay grade.  
• Hope, elpis G1680. Luke (Acts) and Paul use this word many times. See Paul Wrote on Hope.
• Calling, kleseos G2821.
• Riches, ploutous G4149.
• Glory, doxes G1391.
• Inheritance, kleronomias G2817.
• Saints, hagiois G40.

This group has several words that are used in the New Testament under thirty times.

Do a word search with “eye heart”. The first several references in the NASB are references to Old Testament passages.  

Use the links below to explore all of the words in the passage in Ephesians.

Ephesians 1 MOUNCE – Paul, an apostle of Christ  Jesus by the – Bible Gateway

Ephesians 1 Interlinear Bible (biblehub.com)