There's a big difference between being "on" and being "up"!

http://www.personality-insights.com/blog/category/education/page/11/#

There's a big difference between being "on" and being "up". Being "on" is not a genuine positivity that you show to other. You can turn it on and off based on the situation. Generally, those people will turn themselves on in order to impress someone. They are trying to be noticed and they let everyone know how wonderful they are. This will look obviously fake to everyone else since their mood and actions are not consistent. On the other hand being "up" is totaly different. You make a deliberate choice at the start of the day to have a good attitude.  It is a decision that you made to look for the good, the pure and the positive in everything they face that day.

So try to be "up" all the time for a week and see the difference in your life.

Have a good day!