“All action is vicarious faith.”

Now is the Time to Prevent a Third World War (1950)

Source: Life, the Truth, and Being Free (2010), p. 41

Though "the Bard" is often reference to William Shakespeare, Fuller here probably uses the term in a generic sense, and in tribute to the poet-philosopher she considered in some ways her mentor, Ralph Waldo Emerson, who may have made such a statement, which she elsewhere quotes as "I have witnessed many a shipwreck, yet still beat noble hearts".
Woman in the Nineteenth Century (1845)
Context: I stand in the sunny noon of life. Objects no longer glitter in the dews of morning, neither are yet softened by the shadows of evening. Every spot is seen, every chasm revealed. Climbing the dusty hill, some fair effigies that once stood for symbols of human destiny have been broken; those I still have with me show defects in this broad light. Yet enough is left, even by experience, to point distinctly to the glories of that destiny; faint, but not to be mistaken streaks of the future day. I can say with the bard,
"Though many have suffered shipwreck, still beat noble hearts."
Always the soul says to us all, Cherish your best hopes as a faith, and abide by them in action. Such shall be the effectual fervent means to their fulfilment.

Book: Cometan, the Omnidoxy

Rolling Stone interview (2005)
Context: I'm wary of faith outside of actions. I'm wary of religiosity that ignores the wider world. In 2001, only seven percent of evangelicals polled felt it incumbent upon themselves to respond to the AIDS emergency. This appalled me. I asked for meetings with as many church leaders as would have them with me. I used my background in the Scriptures to speak to them about the so-called leprosy of our age and how I felt Christ would respond to it. And they had better get to it quickly, or they would be very much on the other side of what God was doing in the world.
Amazingly, they did respond. I couldn't believe it. It almost ruined it for me — 'cause I love giving out about the church and Christianity. But they actually came through: Jesse Helms, you know, publicly repents for the way he thinks about AIDS.
I've started to see this community as a real resource in America. I have described them as "narrow-minded idealists." If you can widen the aperture of that idealism, these people want to change the world. They want their lives to have meaning.

Christian's Mistake (1865). p. 64
Context: When faith and hope fail, as they do sometimes, we must try charity, which is love in action. We must speculate no more on our duty, but simply do it. When we have done it, however blindly, perhaps Heaven will show us why.

Part II : The Economics of a Socialist Community, § I : The Economics of an Isolated Socialist Community, Ch. 5 : The Nature of Economic Activity, p. 97 http://www.econlib.org/library/Mises/msS3.html#Part%20II,Ch.5
Socialism (1922)
Source: Socialism: An Economic and Sociological Analysis

299
Leaves of Morya’s Garden: Book One (The Call) (1924)