To Thine Own Self Be True

When Shakespeare wrote the famous line, "To thine own self be true, and it must follow, as the night the day, thou canst not then be false to any man," I think he meant that you must do what makes you happy. If you are happy with who you are then you can't be mean to anyother human. I interpret "true" to mean "happy." If that is so then logic would determine that "false" would mean "mean."
I think that this is pretty true for the most part. My example that would support my thought could be proven by simply looking back when you went to lower school. The bullies that inhabit every school we were told if picked on that the bully was mean to you because he was unhappy with himself. If the bully was "true" to himself then he would not be "false" to others. You generally are not mean to people if you are happy and confident in yourself. A happy person would smile, which would cause another smile, which would cause another smile, and so on. Therefore, there is truth in the lines, "To thine own self be true, and it must follow, as the night the day, thou canst not then be false to any man."