What does "loving peace" mean?

At Avot 1:12 Hillel urges us to follow the example of Aaron in loving peace and pursuing it. But what does "loving peace" actually entail, in our daily lives?

Where peace does not exist – whether in a military, political, communal or family context – it is a state of affairs that a person can deeply desire. However, where we
have only experienced peace and cannot easily imagine what its absence feels like, it is difficult to love it rather than to take it for granted, because it is always there.

There is no perfect analogy, but one can make a comparison with the air we breathe: it is there all the time and we do not think about it. If anyone were to ask us: “do you love air?” we would probably be surprised at the question and likely to question the sanity of the person asking it. However, if breathable air is in limited supply, as is the case with submarine and space travel, one’s awareness of its importance increases, as does one’s appreciation of it.

In our lives, air is far more plentiful than peace, but the principle is the same. When peace is present, it displays itself as a series of negatives: no conflict, no hostility, no warfare and so on. This makes it hard for us to be aware of it and consequently to love it. Perhaps Hillel is challenging us in this Mishnah to love peace when it is actually with us, as well as to crave it and pursue it when it is not.