In a Tweet today, Mitch Kapor said, “It’s true. Today is my 60th birthday. It’s a long way from being 16.”

It would take a long, long post here to catalog Mitch’s contributions to the world. Read this and this to get a sense of why I say that.

Mitch has been a friend for some years now. My admiration stems only in part for his amazing achievements in technology and related fields. He and his wife, Freada Kapor Klein, are involved in causes that are improving many lives.

Mitch was an investor in a small project of mine that failed, in part because I didn’t take his advice on a key issue. Of all the parts of that failure that bothered me, none was more difficult than letting him down. He advised: Get over it and move on.

Happy birthday, Mitch.