This story originally appeared in The Centre County Gazette. When T.J. Coursen accepted help from his Penns Valley neighbors during the fight of his life, he made a promise. If he made it through, he wanted to find a way to give back. Nearly two decades later, that promise continues to change lives. What began as a community rallying around a young husband and father battling a rare form of cancer has grown into The Hope Fund, a volunteer nonpro…