"The fear of the Lord is the instruction of wisdom, and before honor is humility." Proverbs 15.33
The main characteristic of those who are born of the Spirit is humility. It was the remarkable nature of the character of the Lord Jesus on Earth, and it could not be different from that of His followers.
But the characteristic of the children of the devil is pride, the mark of Cain and his descendants.
"But while everyone was sleeping, his enemy came and sowed weeds among the wheat, and went away." Matthew 13.25
While the children of light sleep and get distracted, the devil sows his children in their midst to corrupt them and draw them back to darkness, whether it is through dating, marriage or any other form of partnerships.
Those who are wise are careful not to get involved with the children of darkness under any circumstances.
"In this the children of God and the children of the devil are manifest: Whoever does not practice righteousness is not of God, nor is he who does not love his brother." 1 John 3.10
Just like light and darkness are different, the children of God are also different from the children of the devil. Jesus was the example of the Son of God and the hypocritical Pharisees were an example of the children of the devil.
To obey the Word of God is to practice His righteousness.
"In this the children of God and the children of the devil are manifest: Whoever does not practice righteousness is not of God, nor is he who does not love his brother." 1 John 3:10
The difference between the children of God and the children of the devil is in their works. The children of God practice righteousness. In other words, they do not live in sin.
As for the children of the devil, they practice unrighteousness. That is, they live in sin.