Bible Verses About Spiritual Blindness: Leads to all evil

This then I say and testify in the Lord: That henceforward you walk not as also the Gentiles walk in the vanity of their mind:

Having their understanding darkened: being alienated from the life of God through the ignorance that is in them, because of the blindness of their hearts.

Who despairing have given themselves up to lasciviousness, unto the working of all uncleanness, unto covetousness.