"The word of the LORD came to me: "What do you see, Jeremiah?" "I see the branch of an almond tree," I replied. The LORD said to me, "You have seen correctly, for I am watching to see that my word is fulfilled" (Jeremiah 1:11-12)
This is the most amazing promise! I have limited responsibility in my mission. If I do what I am suppose to do, then success of my mission depends upon God. I only have to speak forth what God has placed on my heart and instructed me to do. And He performs it. With obedience always comes a promise, God's promise to me is that He will perform his word. That is powerful.
Isaiah 55:11 says, "so is my word that goes out from my mouth: It will not return to me empty, but will accomplish what I desire and achieve the purpose for which I sent it. " ( Isaiah 55:11 ) Meaning that the word will bring forth a harvest. It will accomplish a purpose. It will not return empty or in vain, but in fullness. God told Jeremiah that He was the one watching his word to see it fulfilled. That wasn't up to Jeremiah, he only had to speak it forth.
Funny thing about a harvest, you can only harvest what has been planted. To have a crop, seed has to be sown. If seed is sown, then a crop is guaranteed because God designed it this way. That is why God has ordained me to sow the seeds of the word into my life and the others I meet. So He can have a harvest. He will cultivate it, he will grow it, then he will harvest it. This is awesome!