This can only be happened by you. Sure, we all can be replaced in a sense in that someone else could do our jobs. Someone else could make those phone calls. Someone else could write those checks. But only you can be you. Only I can be me.
Jesus said in John 10 that he came so that we would "have life and have it abundantly."
That means we shouldn't live half-hearted lives. We need to be all in. All our hearts and souls and minds and strength.
Some days the best we can do is just get through. And that's ok.
Don't waste time wondering or wishing or hating or griping.
Just get out there and live. Really, really live.