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Isaiah 61:1:
"The Spirit of the Lord God is upon me, Because the Lord has anointed me;To bring good news to the afflicted;He has sent me to bind up the brokenhearted,To proclaim liberty to captives And freedom to prisoners".
Being in captive simply means being imprisoned or being in bondage. He who is in captive remain stagnant until he or she is out of the bondage.
The enemy with his accomplice can put a person's life in bondage or in captive in whatever angle of life.
We as believers of Christ, we only have one mediator who can safe us from whatever bondage the enemy as but us.
Brethren, all we have to do is to, obey him, flee from sins, acknowledge Him in whatever you do and believe in Him. Everything will be easier and enjoyable for you only if you do this things.