You cant have a happy family life and a successful career at the same time.
Its all about psychology. A human brain is fascinating: it carries out complex calculations, takes part in learning foreign languages of any level of difficulty, etc. But, when it comes to dealing with emotions (and thats what causes most problems in family/career situation) - the brain simply fails to function. Scientists from many different spheres have already (and repeatedly) proved that multitasking disturbs the thinking process and physically destroys the brain. Its really not easy to stay focused on the presentation at the meeting at work, when youre constantly keep mentally returning to your child, whos sick at home and waiting for your to come back. Or vice versa: can you truly enjoy a family movie night if you remember that your report cant be done following the deadline?
Of course, its depends on the persons feeling itself. Someone may be a mediocre employee and quite an indifferent family member - and he/she still will be thinking he/she is having a happy life. Or a person may be an awesome parent and a successful top-manager - and still not satisfied. So, I think, theres no absolute answer to this question - because family happiness or career success can be measured differently by various people.
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