Identify the theme of this excerpt from the Quit India speeches of 1942 by Mahatma Gandhi, and explain the author's use of diction to support the theme.
"I want the blessings of the whole world so that I may succeed with them. I do not want the United Powers to go beyond their obvious limitations. I do not want them to accept non-violence and disarm today. There is a fundamental difference between fascism and this imperialism which I am fighting. Do the British get from India which they hold in bondage. Think what difference it would make if India was to participate as a free ally. That freedom, if it is to come, must come today. It will have no taste left in it today you who have the power to help cannot exercise it. If you can exercise it, under the glow of freedom what seems impossible, today, will become possible tomorrow."