The marginal cost of doing something 'just this once' always seems to be negligible, but the full cost will typically be much higher. Yet unconsciously, we will naturally employ the marginal-cost doctrine in our personal lives.

In the scriptures, we are told you can't really understand happiness unless you understand sadness. You don't know pleasure if you don't know pain. It's part of life. So can you learn something from somebody who has gone from success to success to success? I don't think so.

When considering a career move, consider the most important assumptions that have to prove true and how you can swiftly and inexpensively test if they are valid. Also, remain realistic about the path ahead of you.

Clayton M. Christensen Quotes