Whoever fulfills one commandment is benefited, his days are prolonged, and he inherits the land; and whoever does not fulfill one commandment is not benefited, his days are not prolonged, and he does not inherit the land.  Whoever is [involved] in the [study of] Scripture and Mishnah and conducts himself properly will not easily sin, as it says (Ecclesiastes 4:12): A three-ply cord is not easily severed; and whoever is [involved] neither in [the study of] Scripture nor Mishnah and does not conduct himself properly is not part of civilization.