Between work, raising children, and other duties required in the home, you will have so many things to do that will draw your attention to "this world" and away from the world which, each and every one of us should be aspiring for internally— the world where Krishna's family lives in perfect harmony. This world gives us hope that there is a place where there are families living happily in full absorption in Krishna. The elderly cowherd men and women, along with their children—young boys and girls—are all absorbed in Krishna in paternal affection, in friendly affection, and in conjugal affection. This is Vrindavana.
(Collected Letters to My Disciples, Pg 137, 2nd Paragraph)