What can keep us from loving like God?

1 John 3:11-18 (CSB)
¹¹ For this is the message you have heard from the beginning: We should love one another, ¹² unlike Cain, who was of the evil one and murdered his brother. And why did he murder him? Because his deeds were evil, and his brother’s were righteous.
¹³ Do not be surprised, brothers and sisters, if the world hates you. ¹⁴ We know that we have passed from death to life because we love our brothers and sisters. The one who does not love remains in death. ¹⁵ Everyone who hates his brother or sister is a murderer, and you know that no murderer has eternal life residing in him. ¹⁶ This is how we have come to know love: He laid down his life for us. We should also lay down our lives for our brothers and sisters. ¹⁷ If anyone has this world’s goods and sees a fellow believer in need but withholds compassion from him ​— ​how does God’s love reside in him? ¹⁸ Little children, let us not love in word or speech, but in action and in truth.