Adverb
to tell the truth (not comparable)
(idiomatic) An attestation to the truthfulness and frankness of an associated statement.
My way of joking is to tell the truth. It's the funniest joke in the world. George Bernard Shaw
The moment we begin to fear the opinions of others and hesitate to tell the truth that is in us, and from motives of policy are silent when we should speak, the divine floods of light and life no longer flow into our souls. Elizabeth Cady Stanton
Above all, I would teach him to tell the truth. Truth-telling, I have found, is the key to responsible citizenship. The thousands of criminals I have seen in 40 years of law enforcement have had one thing in common: Every single one was a liar. J. Edgar Hoover
The words you say to tell the truth are as important as the decision to be truthful. African Proverb
To tell the truth is dangerous; to listen to it is boring. Danish Proverb
He who wants to tell the truth will always stand before closed doors. Danish Proverb