Fastened to the Rock

There has been a song rolling around in my mind all day that has been feeding my spirit.  It's called "We Have an Anchor".  The first line reads:

Will your anchor hold in the storms of life, When the clouds unfold their wings of strife?  When the strong tides lift, and the cables strain, will your anchor drift or firm remain?

The chorus:

We have an anchor that keeps the soul Steadfast and sure while the billows roll, Fastened to the Rock which cannot move, Grounded firm and deep in the Savior's love.

What keeps us from being swallowed up and swept away by the storms of life?  What keeps us from drowning in hopelessness?  How can we stay afloat when the storms of life are so fierce and unrelenting?  What give us peace and joy when we are surrounded by fear?

...having our anchor fastened to the Rock that cannot move!  What are you fastened to?