1 Peter 1:22
Since by your obedience to the truth you have purified yourselves for a sincere love of the believers, (see that you) love one another from the heart (always unselfishly seeking the best for one another).

Our obedience to the truth will change our hearts and increase our love for other believers. As we grow in the Word, we are to grow in the spirit and develop patience and kindness toward each other. Always seeking the best and not being self-serving like the world but set apart.