Seeing ye have purified your souls in obeying the truth through the Spirit unto unfeigned love of the brethren, see that ye love one another with a pure heart fervently: Being born again, not of corruptible seed, but of incorruptible, by the word of God, which liveth and abideth for ever. (1 Peter 1:22-23 KJV)
Loving one another should be the result of having had our souls purified by obedience to the truth of God's word through the work of the Holy Spirit, having been born again by the incorruptible seed of the word of God. Love for other Christians is one of the signs of God's work in the heart.
How is this evident in my own life? In what ways do I fail to love others as I should?