Is being "hopeful" (whatever that is) a realistic expectation? Yeah, maybe someday when we go to heaven - or when Jesus returns - there will be reason to celebrate . . . but now? Today? The psalmist, after generations of disappointment with God and frustration with his circumstances, pens a hymn of praise and encourages others to sing along. Why? Because God gives help and hope to His people. It's not about the solutions, it is about unrestricted divine engagement.
