C.S. Lewis in Mere Christianity makes a brilliant observation about gospel-humility at the very end of his chapter on pride. If we were to meet a truly humble person, Lewis says, we would never come away from meeting them thinking they were humble.They would not be always telling us they were a nobody (because a person who keeps saying they are a nobody is actually a self-obsessed person). The thing we would remember from meeting a truly gospel-humble person is how much they seemed to be totally interested in us. Because the essence of gospel-humility is not thinking more of myself or thinking less of myself, it is thinking of myself less.
This and more in Keller’s excellent book The Freedom of Self Forgetfulness.