Okay, so this is a Bengali one. I've written it in Hindi and also given transliteration and translation in English.
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'जोदी तोर डाक सुने केओ ना आशे, तोबे एक्ला चोलो रे।'
'Jodi tor dak sune keo na aase, tobe ekla cholo re.'
'If no one responds to you, if no one hears to your call, then walk alone.'
~Ravindranath Tagore