Ephesians 1:13

1:13 And when you heard the word of truth (the gospel of your salvation) – when you believed in Christ – you were marked with the seal of the promised Holy Spirit,

Ephesians 2:2

2:2 in which you formerly lived according to this world’s present path, according to the ruler of the kingdom of the air, the ruler of the spirit that is now energizing the sons of disobedience,