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Yes, here are a few quotes that are similar in meaning:
- "A smile can hide so much pain, and so can tears." - Shannon L. Alder
- "A smile is the best way to get away with trouble even if it's a fake one." - Masashi Kishimoto
- "Sometimes the strongest people are the ones who love beyond all faults, cry behind closed doors, and fight battles that nobody knows about." - Unknown