There is only one way in which a person's sincerity can be proved, and that is by one's practice. Fine words can never replace good deeds. Our character is revealed in the choices we make, especially when we must choose between what is true or false, and good or evil. Do you cheat on an exam or on your income taxes, especially when it will cost you? Do you lie, or cover-up, when disclosing the truth will cause you pain or embarrassment? A true person is honest and reliable before God, neighbor, and oneself. Such a person's word can be taken as trustworthy.
What can keep us from falsehood and disaster?