'To be truthful is to be human' is a famous saying. It means to say that a truthful person can be called a perfect human. It might be an emotional saying but I would say it is something like a advice in life. Being truthful is a proverb that teaches us how to live our lives. It's a very true saying. If you can be truthful you can be human.

To conclude an essay, you shouldn't write more than 5-6 lines.