My theory is that, just like with omitting a final comma in a list when not essential for meaning, publishers are trying to save paper and ink or pixels on-screen.

The dash helps to indicate that the two thoughts are intimately related, and it's less stodgy than a semicolon, which would have performed the same function (and who talks in semicolons?).

Victory is produced by and belongs to all.

By instinct we-leaders-want to run hard all the time; by intellect we know this is not possible. Reconciling those two positions in the context of leadership is an ongoing challenge.

I often think about the class differences involved in "jobs" vs. "careers."

If you see players who hate practice, their coach isn't doing a very good job.

Strength of will - is essential to your survival and success. The competitor who won't go away, who won't stay down, has one of the most formidable competitive advantages of all. In evaluating people, I prize ego. It often translates into a fierce desire to do their best and an inner confidence that stands them in good stead when things really get rough. Psychologists suggest that there is a strong link between ego and competitiveness. All the great performers I've ever coached had ego to spare.