In fact, this is the ultimate goal for which man was created. We were put on earth in order to overcome illusion and use our free will to build a relationship with God. He could have made robots, but God doesn't want that. Because this level is difficult to attain, Jewish daily life has built-in reminders. For instance, we put a Mezuzah on our doorpost.
Some people think it's a superstitious ritual to ward off ghosts.
Ponder what's written inside. Kiss it when you go in and when you go out, to always stay focused on what you're living for. You shall love the Lord your God with all your heart, with all your soul, and with all your resources. If you look at nature and recognize that everything God put in the world is a gift, you will come to love Him. And the more you analyze the phenomenal genius, beauty and symmetry of nature, the more you'll appreciate the perfection and kindness of its Creator.