By Liberty I understand the ...

By Liberty I understand the Power which every Man has over his own Actions, and his Right to enjoy the Fruits of his Labour, Art, and Industry, as far as by it he hurts not the Society, or any Members of it, by taking from any Member, or by hindering him from enjoying what he himself enjoys. The Fruits of a Man's honest Industry are the just Rewards of it, ascertained to him by natural and eternal Equity, as is his Title to use them in the Manner which he thinks fit: And thus, with the above Limitations, every Man is sole Lord and Arbitrer of his own private Actions and Property.
 Cato the Younger

Quotes from the same author

Some have said that it is not the business of private men to meddle with government--a bold and dishonest saying, which is fit to come from no mouth but that of a tyrant or a slave. To say that private men have nothing to do with government is to say that private men have nothing to do with their own happiness or misery; that people ought not to concern themselves whether they be naked or clothed, fed or starved, deceived or instructed, protected or destroyed.
 Cato the Younger
I would not be beholden to a tyrant, for his acts of tyranny. For it is but usurpation in him to save, as their rightful lord, the lives of men over whom he has no title to reign.
 Cato the Younger