Robertson of Brighton

While reading In the Face of Jesus Christ, by David Jenks, I came across the following quote:

But “when we are restless, God remains serene and calm. . . . What God is in himself, not what we may chance to feel him in this or that moment to be, that is our hope.”

(F. W. Robertson.)

Frederick William Robertson is also known as Robertson of Brighton. As Eastport was once called Brighton, I took some interest. And S.U.F. Brighton Lodge is a place we all know in the community. Ninety-four of his sermons are online.
Which sermon, or text, the above quote comes from I have yet to find out.