There are a group of people you probably know better than you would like to: they are called family. Your parents raise you, and your siblings help knock off the rough edges. You may not always get along, but you will always share a bond.
Life is not so grand. A loving family can pick you up when you have fallen prey to the worst this world has to offer. No matter how far away you stray, there is something special about coming home.
If there is no love, then it is only a house: typically four walls, a ceiling and a floor. Empty hearts make empty hearths. Everything that enters through such a door dies a little bit each day.
Siblings do not always see eye to eye, and this is because there are different pairs of eyes. Regardless of any semblance, children are individuals. They will be what they will be, and any attempt to change this can only meet with dismal failure.
Good parents raise good children. The little ones learn from the example of those who are bigger. If the progeny strays, then it is the responsibility of their mother and father to set them back on the right path.
Naturally, human beings do not enter this world alone. Ideally, they do not live their lives in solitude. Family is a group of people together, facing all of life's problems and sharing all of its joys... together.