We must know that when we invite people into our lives, we are not just inviting people; but we are inviting experiences into our lives, as well. The time that we will spend with the people that we welcome in, will be the time spent on creating experiences in our lives. We are not really taught this. We are not taught that attached to a person is a world, and in that world our feelings and thoughts will mingle with the feelings and thoughts of the other person. Ultimately, we shape our lives depending upon our choices of the people we take in, and also depending upon the people that we couldn't choose. People are so much more than just lumps of bones, skin, and feelings. When they said one person can change the whole world, what that means is that if you change the life of one person, you are already changing one whole world. And vice versa. So be careful. Be brave, but be careful.