A word or A sentence that can easily change your mood

Today actually I having a nice mood ...
but, just a few minutes ago..
Someone just changed my mood with a very simple sentence...
It might be true but is it too straight?
ya, ACTUALLY is myself problem...
people just try to be straight to the point...
but it sometime can be very cool and hurt~
but is okay... straight might be a good thing also...
and the person who telling thing like this might be the person who dunno to talk or express his/her thinking/feeling in a better way...
and he/she also a person who dunno to take care of other people feeling...
so, it might not completely my own problem...
cheerZzzz up Jennifer~!!