He states that the contemporary definition "represents a serious departure from a more ageless definition" and "cannot be obtained by seeking it." Anyone who has ever sincerely sought and tried to "Be Happy" knows that it is true. You cannot "Find" happiness, per se.
Moreland promises a thoroughly biblical definition of happiness in part II, but
"Then Jesus said to His disciples, `If anyone wishes to come after Me, let him deny himself, and take up his cross, and follow Me. For whoever wishes to save his life shall lose it; but whoever loses his life for My sake shall find it. For what will a man be profited, if he gains the whole world, and forfeits his soul? Or what will a man give in exchange for his soul? (Matthew 16:24-25)
He writes, "Jesus’ invitation to come to Him is invitation to new life in the Kingdom lived from the power of the indwelling Spirit and the resurrected power of Jesus himself. Properly understood, it is an invitation to a life of happiness obtained in a very specific sort of way."
Details to come in part II. I'll be keeping my eyes open.