According to M. Navratilova
"The difference between involvement and commitment is like ham and eggs. The chicken is involved; the pig is committed."
Alas, I was not able to understand the above quote, then I consulted the ODE, which says:
Involvement: The fact or condition of being involved with or participating in something.
Commitment: The state or quality of being dedicated to a cause, activity, etc.
But, after reading those definitions, I still don't understand.
So, what do they mean 'chicken is involved' and 'pig is committed'?