Life is not always going to be all puppies and rainbows. It is not realistic for my baby to be happy all the time.
Life is never going to be perfect all the time, so I should allow my baby to feel some (and I do mean SOME, not too much) distress, frustration and unhappiness.
I will repeat this to myself every time I hear my little one cry. It’s ok to be sad sometimes (though I doubt she knows what sad feels like). It’s ok for her to express herself.