Not all families are holy and many people experience anger and impatience dealing with children, parents, siblings, in-laws, and so forth. It can be worth praying about anger on this feast of the Holy Family. "Be angry, but do not sin," says Saint Paul, "do not let the sun go down on your anger" (Ephesians 4:26).
There is legitimate room for anger and reaction when we encounter injustice and evil. But we have to be on our guard to not let that anger fester overnight and slip into sin.
Spiritual writer Jacques Philippe writes this about the deadly sin:
God's anger is always directed against what is bad for us. He is not angry for himself but to protect people against themselves. But let's not imagine our own anger is always 'holy anger.' Often we become angry under the pretext of defending something essential when we are only acting out of self-love or to protect our own interests.