In 2Co 5:1-9, the walk of faith includes: assurance, anticipation, aspiration to be pleasing. The Christian life is a pilgrimage (Eph 4:1). Two people walking together do so at the same pace (Amo 3:3). Life is dynamic; taking the broad way (not narrow), eventually you spiral downward like the prodigal son (Eph 4:17-19, Rom 1:18-26). We "don't walk as the Gentiles walk" (Eph 4:17). Rom 12:2 -- we are commanded not to be conformed to the world. Our soul is designed to run on truth, but can become a spiritual vacuum "futility of their mind" (Eph 4:17). Our "understanding darkened" starts with letting emotions rule (Eph 4:18, Joh 3:19). "Alienated from the life of God" equates a believers state to an unbeliever's -- the abundant life is missing -- simply not wanting the light; this is illustrated in Rom 1:18-26. The soul of a believer can become seared - "past feeling" (Eph 4:19). Following doctrines of demons because their conscience is seared (1Ti 4:2). When you choose the road, you choose where it leads.
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.