It is written, "You shall love the L-rd your G-d" (Deuteronomy 5:5). That means, G-d's name should be loved through you. That is to say, if a person reads the scripture, studies the Mishnah and attends on Torah scholars, and his dealings with the world are proper, what do people then say of him? Fortunate is his father, who taught him Torah! Fortunate is his teacher, who has taught him Torah! Behold one who has learned Torah, how beautiful are his ways, how just his deeds! ... But if one has learned Torah and served the scholars, but is in his dealings not honest and speaks with people not gently...
Talmud, Yoma 86a