Hannah

Hannah's song in the first book of Samuel enumerates reasons for thankfulness - reasons that are not trivial.  Hannah of course was giving thanks for the birth of her son, Samuel, but the thankfulness she shows goes well beyond the birth of a single child.  Or perhaps the birth of a single child encompasses these matters itself, matters of life and death, the state and the very existence of humankind.  In the words of the KJV, she admonishes early in the song:

"...let not arrogancy come out of your mouth: for the Lord is a God of knowledge, and by him actions are weighed." (I Samuel 2:3)

Wisdom spoken through the words of a mother.