From Mark 4:19  – (cares)

Cognate: 3308 mérimna (see 3307 /merízō, “divide”) – properly, a part, separated from the whole; (figuratively) worry (anxiety), dividing and fracturing a person’s being into parts. See 3309 (merimnaō).

>> So we see here things that fracture and divide people’s being, and that would be a (place) where demons enter or use to deceive and have influence, and we see how vital it is to keep our soul and life IN ( righteousness, peace Joy, in Holy Spirit).