"Every person who wins in any undertaking must be willing to cut all sources of retreat. Only by doing so can be sure of maintaining that state of mind known as a burning desire to win -- essential to success."
-- Napoleon Hill
When you are running a race, you will put all your energy to the finish line even if your muscles are sore and heavy.
In our daily life, we want to get ahead in our positions so we aim at it and work for it. Work that you will exhaust all possibilities to propell you for the desired position. Even with the sacrifice of not seeing your family.
Be ambitious but do not step on other people, play it fair and make time for your family even if you are busy.