People are about as happy as they make up their minds to be. Abraham Lincoln
I can understand people who don't feel well to be more cranky than usual but I don't believe they have a right to inflict pain onto others. IMHO
Beside, "I don't let rent space in my head"
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"It doesn't cost "nuttin", to be nice". 
MOM
I just want to do the right thing! Uncle Joe, (my hero).