with conviction

“Masisi truly understands our challenges and brought better programmes to fund our businesses,” she told the BBC, her eyes shining with conviction.

During the debate, as with his xenophobic fantasies about Springfield’s Haitian immigrants, he has shown himself particularly adept at what Republicans have long turned into an art form – lying with conviction.

Instead of transferring his weight toward the plate and driving down the mound with conviction, he subconsciously held back on throws to protect his surgically repaired elbow.

They speak about the American Dream with conviction, and we've seen the Democratic Party proudly and joyfully waving the American flag.

“They tried so hard to wipe us out,” Strieber said, voice shaking with conviction.