Why is understanding spiritual life important for Christians?

For Christians, grasping the concept of spiritual life is foundational, as it distinguishes between mere existence and having a true relationship with God. Spiritual life, as described in Ephesians 2:1-5, emphasizes that we were once 'dead in trespasses and sins' but have been made alive in Christ. This transformation is not a result of human effort but rather a sovereign act of God's grace. Recognizing this teaches believers to rely entirely on God for salvation and sustenance in their spiritual walk, acknowledging that it is God who imparts life and not their own actions or decisions.