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There are some pretty good "sermons" out there. I get all spiritually overwhelmed when I listen to the pale blue dot.
Or his description of science as a candle in the dark, that ends "the candle flame gutters, it's little pool of light trembles, darkness gathers, and demons begin to stir".
But you can also hit a humanist-type spirituality from the other side. Starting with a religion, and chucking out the god.
Christianity without God, for instance.
Or you could look for your local secular humanist group, and see if they've got something for you.
But I think that the grim reality of the universe is that it is indifferent. You have to make your own meaning. Perhaps the a defining aspect of Homo Sap, compared to earlier homonids is that we derive social cohesion by telling stories and believing them. The curse of the skeptic, is that those stories also need to be true.
Good luck in your search.
Looks like they've spent some time reading "Christianity Without God" by Lloyd Geering - the last presbyterian to be tried and convicted of heresy in the world.
http://www.amazon.com/Christianity-without-God-Lloyd-Geering/dp/0944344925