Non-violence is backed by the ...

Non-violence is backed by the theory of soul-force in which suffering is courted in the hope of ultimately winning over the opponent. But what happens when such an attempt fail to achieve the object? It is here that soul-force has to be combined with physical force so as not to remain at the mercy of tyrannical and ruthless enemy.
 Bhagat Singh

Quotes from the same author

They may kill me, but they cannot kill my ideas. They can crush my body, but they will not be able to crush my spirit.
 Bhagat Singh
The people generally get accustomed to the established order of things and begin to tremble at the very idea of a change. It is this lethargical spirit that needs be replaced by the revolutionary spirit.
 Bhagat Singh
The elimination of force at all costs is Utopian and the new movement which has arisen in the country and of whose dawn we have given a warning is inspired by the ideals which Guru Gobind Singh and Shivaji, Kamal Pasha and Reza Khan, Washington and Garibaldi, Lafayette and Lenin preached.
 Bhagat Singh
The aim of life is no more to control the mind, but to develop it harmoniously; not to achieve salvation here after, but to make the best use of it here below; and not to realise truth, beauty and good only in contemplation, but also in the actual experience of daily life; social progress depends not upon the ennoblement of the few but on the enrichment of democracy; universal brotherhood can be achieved only when there is an equality of opportunity - of opportunity in the social, political and individual life.
 Bhagat Singh
The sanctity of law can be maintained only so long as it is the expression of the will of the people.
 Bhagat Singh