O God, thy sea is so great, and my boat is so small

The above was a plaque that US President John F Kennedy had on his desk in the White House.

Here's the entire poem, by an unknown author:

Thy sea, O God, so great,
My boat so small,
It cannot be that any happy fate,
Will me befall,
Save as Thy goodness opens paths for me,
Through the consuming vastness of the sea.

Thy winds, O God, so strong,
So slight my sail.
How could I cub and bit them on the long
and salty trail,
Unless Thy love were mightier than the wrath
Of all the tempests that beset my path?

Thy world, O God, so fierce,
And I so frail.
Yet, though its arrows threaten oft to pierce
My fragile mail,
Cities of refuge rise where dangers cease,
Sweet silences abound, and all is peace.

"Storm at the Sea of Galilee"- Rembrandt