It says in Tana Devei Elyahu that when Torah enters a person’s heart, foolishness leaves his heart. The main reason people abandon mitzvas is because they didn’t learn Torah, thus a person should realize how essential it is for him teach his children Torah, Neviim, and Kesuvim, then Mishna and Talmud, because that will implant in the child’s heart the fundamentals of Jewish belief and will keep false ideas away. Fortunate is the person who takes these things to heart and implements them in his home.