"L'enfer, c'est les autres" (Satre- not the nicest man)
Can you handle the diversity in your family? Even those people sharing DNA and environment in a family will be different from each other- there will be the black sheep, the artsy one, the athlete, crazy Aunt Martha, grumpy Great-Grandpa, the quiet one, the trouble-maker, the irritating one with some family members being combinations of various categories.
The Church is a family- bound by the sacraments instead of blood, and it is just as diverse as any family. Because the Church is made up of people, it will never be a perfect church-going experience. There will be tone-deaf people who insist on singing really loudly. The priest- yes, he is a family member too- might be a little too human and obsessed with his golf game. There will be people from different ethnic, economic, educational and even religious backgrounds- can you handle it? There will be people there dealing with divorce, abuse, addiction, even mental illness- can you handle it? Tolerance and acceptance of the diversity in any group larger than one person doesn't mean that we have to accept bad behavior, but like in any loving family, we must love everything about our fellow Church family members except sin.