Brotherly love in the biblical sense is an extension of the natural affection associated with near kin, toward the greater community of fellow believers, that goes beyond the mere duty in Leviticus 19:18 to "love thy neighbour as thyself", and shows itself as "unfeigned love" from a "pure heart", that extends an unconditional hand of friendship that loves when not loved back, that gives without getting, and ever looks for what is best in others. Wikipedia