We need to see Jesus Christ character in order to become like Him -- to "walk worthy of our calling" (Eph 4:1-2). Mat 11:25-29 you have to become a child to believe the truth -- totally depend upon Him. "Take my yoke" - school of learning - "for I am gentle and humble in heart". Mat 12:19 He didn't quarrel nor cry out. Eph 4:1-32 is a school intended to reflect Christ's character; Eph 4:2 illustrates. "lowly" means dependent; "gentleness" refers to power under control; "long-suffering" means to have a short fuse. Luk 1:46-55 Mary expresses this character while speaking of the coming Savior.
More than any book Ephesians reveals the blessings from God based on our relationship with Jesus Christ by grace through faith. Eph 1:3 is the a key verse. Other key verses by chapter include Eph 2:8 Eph 3:19 Eph 4:1 Eph 5:18 and Eph 6:10-11.