Did love make Bhagat Singh a weaker revolutionary? In a heated argument once, Sukhdev accused him of allowing his fascination with a woman to come in the way of revolutionary duty. Bhagat Singh's answer, in a letter days later, was a defence of love as a revolutionary's strength, not a weakness. On Bhagat Singh's 119th birth anniversary, Utkarsh Mishra looks at the friendship, arguments and ideas that bound him and Sukhdev together.