Probably the best training advice I've ever heard.
I'm also partial to the following exchange, from the same piece:
Q: What if I get tired?
A: You will get tired, I can guarantee it. IT WILL PASS. Trust me.
Q: How many miles should I run?
A: I don't know, but more than you've been doing.
But I digress.
It's 100 degrees but fast guys are willing to gut out a six mile top-end aerobic effort, sucking wind, pouring sweat, accumulating lactate. Probably no one would do it alone; but no one is willing to be the guy that doesn't show.
Peer pressure and half-stepping but the conversation doesn't drop nor does the pace. A military guy leading the new-to-town ROTC kids on a jog yells Shit! as we surprise-pass him. Someone waves a hamburger at us. Air conditioning and water.
Finished, exhilarated. It's not a "long run" day and in fact, that right there was just a tempo run (if anyone can agree what the hell that is). I'm pretty sure Daniels' Running Formula has those runs on separate days... But there's more in the tank, so...
Don't waste good time.
Two hours later and I've lost more water than I could have ever imagined holding. Dream of winter until it comes then dream of this. Either works, though. Anytime is good time when your legs say so.
(From the same site at the top of the post, here are some Bill Rodgers training logs. Just unfathomable. Not that these have anything to do with the rest of the post, they're just too cool not to share.)