1 Corinthians 10:21-22 "You cannot drink the cup of the Lord and the cup of demons; you cannot partake of the Lord's table and of the table of demons. Or do we provoke the Lord to jealousy? Are we stronger than He?"
Unholy alliances do not just mean in the military but also marrying a non-believer to a believer in a first marriage. So many young Christian people are ignoring the warnings about this, they think it is alright to date an unbeliever but dating is a bonding experience and should not be practiced.
I think this is why we see so many false converts today, the unbelievers are pretending to become a Christian to satisfy the believer, fooling the believer into thinking they were born again when there was no salvation experience. The unbeliever thinks it's merely a club to join with certain standards but they have no real dedication to Christ.
Matthew 15:7-9 "…7 You hypocrites! Isaiah prophesied correctly about you: 8 ‘These people honor Me with their lips, but their hearts are far from Me. 9 They worship Me in vain; they teach as doctrine the precepts of men.’ ”…"
Many people in our culture today think becoming born again is nothing more than a set of rules and an outward show, they do not have the Holy Spirit nor do they recognize Him. In fact, often they are hostile to His Word and His presence.
A born again believer has confessed their sinfulness, after that Christ comes to live in them, guiding them and protecting their soul from harm.
The born again believer has all the fruit of the Spirit as mentioned in God's Word. Authentic born again believers can sense the Spirit of God in another authentic believer. There is an immediate connection and witness that is undeniable.
Galatians 5:22-23
"22 But the fruit of the Spirit is love, joy, peace, patience, kindness, goodness, faithfulness, 23 gentleness, self-control; against such things there is no law."