"....Every new beginning comes from some other beginning's end."
That is one of my favorite lines from a song by Green Day. It is a reminder that many new beginnings take place after something before it, often exciting, comes to an end, most often not by our choice.
Some examples in our recruiting business:
1) Loss of a recruiting client. You get a call from your best client saying they have just been acquired by a bigger company and all the openings are on hold. (when I got this call, my client was generating over $400k recruitment cash in per year, yes PER YEAR!)