The soul will bring forth Person if God laughs into her and she laughs back to him. To speak in parable, the Father laughs into the Son and the Son laughs back to the Father; and this laughter breeds liking and liking breeds joy, and joy begets love, and love begets Person, and Person begets the Holy Ghost.
Meister EckhartI have sought earnestly and with great diligence that good and high virtue by which man may draw closest to God... and as far as my intelligence would permit, I find that high virtue to be pure disinterest, that is, detachment from creatures. Our Lord said to Martha 'Unum est necessarium', which is to say; to be untroubled and pure, one thing is necessary and that is disinterest.
Meister Eckhart