You cannot save a life.
Now, there is the very literal running in and diving in front of a bullet before it hits someone else kind of saving a life, but that's not what I'm talking about.
You cannot save a life.
In the under-read and under-appreciated book of Ezekiel, the Lord leads Ezekiel into a valley of dry bones and asks him, "Son of man, can these bones live?"
What does Ezekiel say? Does he hop around, waving his hand in the air shouting, "Pick me! Pick me!"
"Yes, Ezekiel."
Ezekiel clears his throat and says importantly, "Yes, and I'm going to be the one to bring them back to life!"
No. That's not what Ezekiel says. He looks around at this valley of dry bones, shakes his head, and says humbly, "O Sovereign Lord, You alone know."
After Ezekiel admits that only God knows whether this is possible -- then the Lord uses him. He says, "Prophesy to these bones and say to them, 'Dry bones, hear the word of the Lord! This is what the Sovereign Lord says to these bones: I will make breath enter you, and you will come to life. I will attach tendons to you and make flesh come upon you and cover you with skin; I will put breath in you, and you will come to life. Then you will know that I am the Lord.'"
Notice something about that last passage. Who's doing the talking? Ezekiel is the one speaking to the bones...but it's God who's putting the words in his mouth. It's God who's fulfilling what He is commanding Ezekiel to prophesy. It's God who's bringing the dead back to life. Ezekiel's only response is, "So I prophesied as I was commanded."
What we need to realize is that we are the hands and feet of Christ. We are the mouthpieces. We are the hugs, the tissue-providers, the audible encouragers, the back-rubbers, the loving note writers. We are, in a sense, the prophets of Jesus Christ. But we are not Jesus Christ. All the hugs and tissues and loving notes in the world are not going to change someone. They're not going to save a life. Jesus Christ working through you is.
Does this mean we should pack up our bags and never try to change someone's life again? Absolutely not. We are to do as Ezekiel did and be able to say, "So I prophesied as I was commanded." Just as you cannot save a life without Jesus working through you, Jesus desires a vessel through which to work.
This should not be a distressing thought, that you are incapable of saving a life. It's out of your hands. It is up to God, and in His hands, this person you care so much about is entirely, completely, wonderfully safe. Do not refuse the call to be the hands and feet; but also do not believe that you, on your own, are solely responsible for redeeming a soul. Follow in the footsteps of Ezekiel, who said, "The hand of the Lord was upon me"; and only then were lives changed and the dead brought back to life.