I am not entirely sure, but I think it is some sort of belief system whereby you can achieve happiness, fulfillment and enlightenment by making the right (spirit) choices.
It might be a different way of referring to (chanelling) positive thinking over negative (or practical/judgemental) thinking.
Having the right spirit (attitude towards a solution) brings forth fruit. And the fruit of the Spirit is love, joy, peace, patience, kindness, goodness, faithfulness, gentleness and self-control.
I may of course be completely off track, but I am sure if I am, someone will let us know.