New Delhi: Teachers "tirelessly light the lamp of knowledge", said Prime Minister Narendra Modi Friday, a day that is celebrated as Teacher's Day.

Narendra Modi

Modi tweeted: "Teachers' Day greetings! We salute all teachers, who tirelessly light the lamp of knowledge."

"Tributes to Dr. Sarvepalli Radhakrishnan. Teacher, scholar and statesman, he remains an inspiration for the entire nation."