And without faith it is impossible to please God, because anyone who comes to him must believe that he exists and that he rewards those who earnestly seek him. (NIV)
To me, there are few things more personal than your toothbrush. It is an essential tool we need to use every day to keep our teeth and mouth clean. Even though it is of utmost importance, if I ever forgot to pack my toothbrush when going away for a few days with my husband, I could never use his toothbrush! Although my husband and I have shared many things over our almost forty years of marriage, we will never share a toothbrush.
Our faith in Jesus Christ needs to be as personal as our toothbrush. We cannot "share" our parents or grandparents' faith. While having believing parents and grandparents is a wonderful foundation to build upon, each of us must still take the step to faith by ourselves.
Timothy is a good example. He had the privilege of having both a believing mother and grandmother. The apostle Paul wrote, "I have been reminded of your sincere faith, which first lived in your grandmother Lois and in your mother Eunice and, I am persuaded, now lives in you." (2 Timothy 1:5). While they modeled their faith to Timothy, he had to believe on his own.
The old saying, "God has no grandchildren" is true. We can never substitute someone else's faith for our own.