We ought not to look to some non-human standard or transcendent concept. Jen or human-heartedness operates differently in different situations with different persons. It would be inappropriate to love our parents in the same way as we love our friends. It would be inappropriate to love strangers or enemies in the same way as we love our friends. To be fully human means to include the fulfillment of others in our own fulfillment.
Humanity means co-humanity.
One who acts without concern for family and friends and society has not developed his humanity, is not completely human. Human means co-human. Jen is the virtue of cooperation and accommodation, not individual enhancement at the expense of others. What you do not wish others to do to you, do not do to them. This is similar to the Western golden rule, stated by Confucius in negative terms.