Prime Minister Narendra Modi today extended greetings to the nation on the 400th birth anniversary of Guru Teg Bahadur, saying his sacrifice gives "strength and motivation" to many."On the special occasion of his 400th Parkash Purab, I bow to Sri Guru Teg Bahadur Ji. He is widely respected globally for his courage and his efforts to serve the downtrodden. He refused to bow to tyranny and injustice. His supreme sacrifice gives strength and motivation to many," the Prime Minister tweeted in the Punjabi language.