Evangelist Billy Graham turned 70 in November, but he intends to keep preaching until he starts receiving his heavenly pension. "There's no retirement in sight," Graham told The (Charlotte, N.C.) Observer. "Nowhere in the Bible does it talk about preachers or clergy or prophets retiring." But apparently Graham has found some scripture that says it's OK to slow down in the later years because he plans to step down from several boards to give others a chance to serve. Graham said he may heed the advice of his doctors at the Mayo Clinic and take a six-month sabbatical to rest and begin work on his memoirs.