Smiles open doors to new opportunities.
Meaning: Smiling can help people to get new opportunities because it makes them seem more friendly and approachable.
Choice of Words: A door is a movable barrier that opens to allow people or things to enter or leave a building or room. Opportunity is a chance to do something or to achieve something. When you say "Smiles open doors to new opportunities," it means that smiles can help people to get new opportunities.
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