After that it naturally follows that our love for ourselves grows and then expands to include all of our brothers and sisters. Following are a few passages from the Bible. I only know the location of the first two passages. You will need to find the others if you are so inclined. But the greatest of these is love.
Love never fails.
Every man that loves is born of God and knows God. Our love of God is His love of us in action. As our love expresses itself to others in a God-like manner it is His love expressing itself through us. The only obligation we have in this life is to allow God's love to transform our love. Allow love to precede and trust will follow.