What gardening teaches us is that if you plant things, they'll come up. But you have to be willing to wait for them to bear fruit because things are seasonal.
There are no accidents, all things have a deep and calculated purpose; sometimes the methods employed by Providence seem strange and incongruous, but we have only to be patient and wait for the result: then we recognize that no others would have answered the purpose, and we are rebuked and humbled.
If you wish to heal your own sadness or anger, seek to heal the sadness or anger of another. Those others are waiting for you now. They are looking to you for guidance, for help, for courage, for strength, for understanding, and for assurance at this hour. Most of all, they are looking to you for love.
Don't lose faith. Promise yourself that you will be a success story, and I promise you that all the forces of the universe will unite to come to your aid; you might not feel today or for a while, but the longer you wait the bigger the prize.
I live now on borrowed time, waiting in the anteroom for the summons that will inevitably come. And then - I go on to the next thing, whatever it is. One doesn't, luckily, have to bother about that.