Reasons why people would enter Heaven or Hell

Abu Hurairah narrated that the Messenger of Allah (ﷺ) was asked about that for which people are admitted into Paradise the most, so he (ﷺ) said:

"Taqwa (fear) of Allah, and good character." And he (ﷺ) was asked about that for which people are admitted into the Fire the most, and he (ﷺ) said: "The mouth and the private parts."

Jami`at-Tirmidhi 2004