The topic of sincerity is part of a larger set of weekly character trait lessons, geared for use in the home or classroom.
being genuine and free from hypocrisy
acting genuely and speaking honestly to everyone without any selfish or impure motive
Words that mean the opposite of sincere: phony, fake, and disingenuous.
“Having purified your souls by your obedience to the truth for a sincere brotherly love, love one another earnestly from a pure heart,”