Here are some exerpts from Cato's Letters

sent to me by the Mises.org folks:
Cato's Letters
By liberty, I understand the power which every man has over his own actions, and his right to enjoy the fruits of his labor, art and industry, as far as by it he hurts not the society, or any members of it, by taking from any member, or 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 arbiter of his own private actions and property...no man living can divest him but by usurpation, or by his own consent.
....
True and impartial liberty is therefore the right of every man to pursue the natural, reasonable, and religious dictates of his own mind; to think what he will, to act as he thinks, provided he acts not to the prejudice of another; to spend his own money himself, and lay out the produce of his labor his own way; and to labor for his own pleasure and profits, and not for others who are idle, and would live...by pillaging and oppressing him, and those that are like him...