It's amazing how people can find all the mistakes in the world concerning another person, but look into the mirror every day without making changes within. Stop looking down your nose at others, What does that achieve? We all can make room for improvements. Most of the time it starts with a little attitude adjustment.
A good character is not only about the good person people know you to be. Your ability to tell the truth about how bad you had been is also a good character.
...I do not think that it is right for a man to appeal to the jury or to get himself acquitted by doing so; he ought to inform them of the facts and convince them by argument. The jury does not sit to dispense justice as a favour, but to decide where justice lies; and the oath which they have sworn is not to show favour at their own discretion, but to return a just and lawful verdict... Therefore you must not expect me, gentlemen, to behave towards you in a way which I consider neither reputable nor moral nor consistent with my religious duty.
If someone lied to you, and you positively know this is true, you may find delight in telling them they are the most honest person you know; continue flattering them, giving them the most wonderful compliments, including how you're so thankful to have such an honest person in such a deceptive world. But, then again, this may very well make you a liar too.