A person can be very happy even though they are also grumpy.

You sadden me, my Malina. I can see well that you are unhappy, and it is your fault, I tell you. Be calm, I don't think you are crazy, but you are upset and irritated, and when you are like that, you make others suffer too. You say that I have no worries or suffering – it is true that I am very happy, but if you knew how much a person can be happy, even while being grumpy at the same time; one must always look to the good God. At first, when a person feels that it is boiling within them, they must try, but very gently. With constant patience and with a good God, a person can manage.

(Elizabeth of the Trinity, letter 123)