By Gerald Liu Crossover — not the maneuver deployed on basketball courts; but the overlap of “sacred” and “secular” in musics — thematizes Benjamin M. Stewart’s interview with Don E. Saliers, William R. Cannon Distinguished Professor of Theology and Worship, Emeritus and platinum, gold, and Grammy award winning Indigo Girl, Emily Saliers. In the Practical Matters (issue 1) video segment…