Jeremiah 20:7-8

Jeremiah said: "The word of the LORD has brought insult and derision upon me. And so I said to myself, 'I shall not think about him, I shall no longer speak in his name.' But there seemed to be a burning fire in my heart, which I could not contain."

Jeremiah did not want to be a prophet, but he felt called. How did he know that his call came from God? He didn't know, but he had sufficient faith to test his calling by following it. 

Like Jeremiah, we cannot be sure that we are right about God, but we can test our faith by living faithfully with hope and love.

Grace and peace...Bob