Losing One’s Share in The World to Come

• The Sages say that for three transgressions one forfeits his portion in the World to Come: murder, adultery, and idol worship, and that lashon hara (Evil Talk about another person) is equivalent to all three. (B. Erchin 15b)

• The following have no portion therein: he who maintains that resurrection is not a biblical doctrine, the Torah was not divinely revealed, and an epikoros. R. Akiva added: one who reads non-canonical books. Rav and R. Hanina both taught that an epikorus is one who insults a scholar. R. Yochanan and R. Joshua b. Levi maintained that it is one who insults his neighbor in the presence of a scholar. A Tanna explains that when R. Akiva says “non-canonical books”, he is speaking about books of the Sadducees. R. Yosef says that it is also forbidden to read the book of Ben Sira. (Sanhedrin 90a)

• One who talks during the repetition of the amidah (Rabbinic Instituted Prayer) is called “a sinner whose sin is too great to be forgiven. (Mishnah Berurah 124:27.)

• One who converses during Krias ha-Torah (talks during the reading of the Torah) is called “a sinner whose sin is too great to be forgiven.” (Bieur Halachah 146:2)

• R. Eleazar of Modin said: One who profanes things sacred, and one who slights the festivals, and one who embarrasses his fellow-man in public, and one who nullifies the covenant of our father Abraham, and one who exhibits impudence towards the Torah contrary to halacha, even though he has to his credit Torah and good deeds, he has not a share in the world to come. (Avot 3:11 or 3:15)

• Among those who lose their share in the World to Come are those who treat Chol Hamoed disrespectfully, as any other weekday (Rashi to above mishna in Avot.)

• Hillel used to say: He who makes worldly use of the crown of the Torah shall perish. Thus you may infer that any one who exploits the words of the Torah removes himself from the world of life. (Avot 4:7)

• Anybody who undertakes to learn Torah all the time, does not work, and support himself from charity is desecrating God’s Name, disgracing the Torah, extinguishes his Jewish spark, causes bad to befall him and destroys his life in the World To Come, for it is forbidden to benefit from Torah matters in this world. (Rambam Hilchot Talmud Torah 3:10; see also his laundry list in Hilchot Teshuvah.)

Article take from the blog; Frum Hertic

My personal comments: Some of these I highligthed I feel are very important for people who strive for high morals and some things are a little over the top like reading books that are not part of scripture or rabbi’s approval.