Jios,
Believe it or not I spent a day pondering this message -- off and on. It struck a chord with me. Pk70 your reaction is understandable -- {censored} for tat - thinking. Because the sentence says in so many words, accept a balanced connection. It does appear to advise people that they should give and receive in equal measure.
But I don't think that is the message. Gurbani tells us that there is only One friend who gives unconditionally and completely. He is the only One from whom we can expect unquestioned grace and mercy. He forgives upon request -- as long as we are sincere. Gurbani tells us that our family, spouse, friends and associates cannot go with us when we leave, and that some of them cannot even wait for us to go to the cremation pyre. Gurbani is saying that we have our feet and some of us, our brains, stuck in Maya -- which is a place of need and therefore of pain.
People therefore sometimes, and sometimes too often, use one another. This is unfortunately true in family and marriage, and at work or in communities, and even in gurdwaras. That is the pain of karma. In detachment from our passions, emotions, and illusory theories about our relationships, we can step back and consider the words of "the enlightened one" whoever that is. Frustration and anger inevitably result from feelings of imbalance in relationships. I read this as advice to protect ourselves from emotional harm, abuse and exploitation by those whose karmic pain is greater than our own.
And the only way to do this is by being very objective. To use this kind of algorithm:
X has pain that is very great. That is why X is exploiting me or being abusive to me. I must not place all of my hopes and emotions in a relationship with X. What will happen? I will be allowing karma that belongs to X to become part of my burden. If I do this, then I may lose my chance on this earth for liberation. And continue to be separated from the Only One whose love is unconditional. The Only One who is without pain, hatred, or animosity. The Only One who has no karma to inflict on the world.
Does that make sense? Apologies for taking so much time to say this.