30th Sunday in Ordinary Time: Can We Run Out of Love? (a.k.a. A Personal Tribute to JPII)

One of the questions that comes up when Jesus gives his two-fold command to love God with our whole self AND to love our neighbor is if we can run out of love. If I give God most or all of my heart's love, will I have any leftover to love others? Yet Jesus doesn't seem to see any contradiction here... Perhaps a way forward is the witness of the lives of the saints (like Mother Teresa and JPII) who, their hearts being on fire with love for God, are able to spend themselves generously and whole-heartedly in love for their neighbor.