2 John 6 "And this is love: that we walk in obedience to his commands. As you have heard from the beginning, his command is that you walk in love. (NIV84)
If "we have come to know and have believed the love which God has for us" (1 John 4:16, NASB), then we can "walk in love." If we "abide" in Christ's love for us (John 15:9), then we can "walk in love."
For apart from Jesus, we can do nothing. (John 15:5)