Prism Weight Loss Program is a common-sense system to achieve your right weight by learning good eating habits and a healthy attitude toward food, all with a spiritual basis. Three courses are available in the Grass Valley area. A six-week Phase I course starts at 2:30 p.m. today at Peace Lutheran Church, 828 W. Main St., Grass Valley (near downtown). Call Carol Lenhard at (530) 274-4477. A free, mandatory orientation is at 6:30 p.m. Thursday, Feb. 7, at First Baptist Church, 1866 Ridge Road, Grass Valley (across from Nevada Union High School). Phase 1 starts at 6:30 p.m. Thursday, Feb. …