In the past, I have taken this to mean, for example, in my work with my students that I make sure that I'm not privileging some students over others or asking more of my students than I ask of myself.
This morning, though, I realized that although I do my best to be just and fair with others, I'm not always just and fair with myself. Using students as an example again, I expect myself to work harder and sacrifice more.
God's wisdom, though, is "without partiality and without hypocrisy." Love wants us all to be treated fairly and kindly and generously. We don't have to prove our devotion or worth by our degree of self-sacrifice. Instead, treat yourself with the same principled and generous kindness with which you treat others.