There was a time that we know as Jahiliyah (the age of ignorance). This was the time when people in Arabia worshiped idols, buried female babies alive, and committed many other ignorance.
And this was the time when Rasulullah (saw) got message to spread Islam, a religion of Allah that look strange and not familiar (gharib) in eyes of Arab people in that time. As we know, it was not easy for Rasulullah (saw) to tell Islam to the people. But, Alhamdulillah, then Islam spread among people, not only among people of Arabia, and later Islam reached its golden age.
Now we are living in modern day, and Islam has become a big religion with more than one billion of believers. But, if we look around we would see a reality that Islam now is considered as something strange, and many people, even Muslims, are not familiar with Islam. Every Muslim says "I'm a Muslim", but how many of them who really live under Islam?.
Do you realize, sis?, now we are living in the time when many Muslims say "I'm Muslim" but actually they deny Islam. Many Muslims ignore sunnah, they regard Sharia is an old product that not suitable for this modern day. Yes, for those people, Islam is something that not familiar with them.
However, if we look around again, we can see some Muslims who still live under Islam. They follow Qur'an, follow sunnah, and usually they active in Shi'ar (telling people about) Islam.
But, can you see what happen to those pious people?. Other people see those pious people as strange people because they do not enjoy the dunya pleasure. Even other people regard those pious people as creature that should be avoided. And this make those pious people 'isolated' from society that full of people who obsessed with dunya pleasure. This make those pious people become "the strangers" (Ghuraba).
But actually "the stranger" are the lucky people, because they are the saved people who will go to Jannah.
May Allah make us become The Strangers.