To be good Christians you have to contemplate the suffering humanity of Jesus. "How can we bear witness? Contemplate Jesus. How can we forgive? Contemplate Jesus suffering. How can we not hate our neighbor? Contemplate Jesus suffering. How can we avoid gossiping about our neighbor? Contemplate Jesus suffering. There is no other way". These virtues are the those of the Father, who forgives us always, and Our Lady, Our Mother, shares in these virtues too.
A sibling is a friend for life, but they are a friend for life that you are forced to have. And like anything that you are forced to do, occasionally people will drive you crazy.