'Truthful' in the Bible

The Teacher sought to find delightful words, and he wrote what is upright--truthful words.

And they sent their disciples to him with the Herodians, saying, "Teacher, we know that you are truthful and teach the way of God in truth, and {you do not care what anyone thinks}, {because you do not regard the opinion of people}.

And [when they] came, they said to him, "Teacher, we know that you are truthful and {you do not care what anyone thinks}, {because you do not regard the opinion of people} but teach the way of God in truth. Is it permitted to pay taxes to Caesar or not? Should we pay or should we not pay?"

through glory and dishonor, through slander and good repute, [regarded] as deceivers and [yet] truthful,

So then, have I become your enemy [by] being truthful to you?