I have always loved this saying, and in fact have pretty much lived my life by it. I used to have it framed, on the wall in my office, when I was a bank manager, over 17 years ago.
Every morning in Africa, a gazelle wakes up. It knows it must move faster than the lion or it won't survive. Every morning, a lion wakes up, and it knows it must move faster than the slowest gazelle or it will starve. It doesn't matter if you're the lion or the gazelle. When the sun comes up, you'd better be moving.
`Maurice Greene, 5 time world champion 100 meter sprinter