Events were so shaping themselves in Johannesburg as to make this self-purification on my part a preliminary as it were to Satyagraha. I can now see that all the principal events of my life, culminating in the vow of Brahmacharya, were secretly preparing me for it. The principle called Satyagraha came into being before that name was invented. Indeed when it was born, I myself could not say what it was. In Gujarati also we used the English phrase 'passive resistance' to describe it. When in a meeting of Europeans I found that the term 'passive resistance' was too narrowly construed, that it was supposed to be a weapon of the weak, that it could be characterized by hatred, and that it could finally manifest itself as violence, I had to demur to all these statements and explain the real nature of the Indian movement. It was clear that a new word must be coined by the Indians to designate their struggle.
But I could not for the life of me find out a new name, and therefore offered a nominal prize through Indian Opinion to the reader who made the best suggestion on the subject. As a result Maganlal Gandhi coined the word 'Sadagraha' (Sat=truth, Agraha=firmness) and won the prize. But in order to make it clearer I changed the word to 'Satyagraha' which has since become current in Gujarati as a designation for the struggle.
The history of this struggle is for all practical purposes a history of the remainder of my life in South Africa and especially of my experiments with truth in that sub-continent. I wrote the major portion of this history in Yeravda jail and finished it after I was released. It was published in Navajivan and subsequently issued in book form. Sjt. Valji Govindji Desai has been translating it into English for Current Thought, but I am now arranging to have the English translation published in book form at an early date, so that those who will may be able to familiarize themselves with my most important experiments in South Africa. I would recommend a perusal of my history of Satyagraha in South Africa to such readers as have not seen it already. I will not repeat what I have put down there, but in the next few chapters will deal only with a few personal incidents of my life in South Africa which have not been covered by that history. And when I have done with these, I will at once proceed to give the reader some idea of my experiments in India. Therefore, anyone who wishes to consider these experiments in their strict chronological order will now do well to keep the history of Satyagraha in South Africa before him.
Source : "The Selected Works of Mahatma Gandhi Autobiography (Vol. 1)