The question as to whether hiding your feelings conflicts with the essence of truth is an interesting paradox posed simply as: is it a lie to deny your feelings?
Take the following hypothetical example: You and a co-worker are reasonably attracted to each other; however, both of you are married. During a work study project developed around betting on the emotional responses of others (you truly have horrible bosses for those being paid), you two are asked to discuss such feelings with each other. Let’s say, for the sake of this example, that both of you are bona fide in your prerogatives and feel intensely albeit different reasons. Also assume both know that the results of the experiment will be broadcasted live for a wide range audience.
The first issue transpires around whether the public facade changes what one would do in a private setting.
In most cases, clearly it does. However, undoubtedly, there is always the atypical situations.
More specifically, if someone was to act such way in a public setting, it would lead to the following initial conclusions: 1) such person was acting; 2) brave or 3) giving in to what was expected or wanted. It should be typically observed that two people who were to conduct in an extramarital affair (albeit emotional and/or physical for the sake of discussion) would not want it publicly broadcasted as matters of the heart are generally kept private in any social setting.
The second issue revolves around whether it is a lie to deny your feelings or more specifically, the truth related to how the feelings make you feel when it is of issue.
This is a more interesting topic, and one that may not come up often as most situations to do not require a distinction of honesty vs. truth. I relate honesty to the facts at hand, whereas truth encompasses both facts and feelings.
In application, I quote:
Mark 7:20-23: He went on: “What comes out of a person is what defiles them. For it is from within, out of a person’s heart, that evil thoughts come—sexual immorality, theft, murder, adultery, greed, malice, deceit, lewdness, envy, slander, arrogance and folly. All these evils come from inside and defile a person.”
The point of this Bible verse echoes (to me at least) the principal of prevention verses correction, meaning that the sin begins when it felt in the heart from the inside that “defiles” such a person.
Romans 12:2 states: Do not conform to the pattern of this world, but be transformed by the renewing of your mind. Then you will be able to test and approve what God’s will is—his good, pleasing and perfect will.
Therefore, if one feels in his or her mind, while an action has not been consummated, it echoes that at the very least, sin has been committed.
The third issue revolves around what constitutes feelings into action.
Now, I am an advocate that what one feels/thinks and what we do are separate from actions.
The question remains what defines an action, of which thank goodness that God is the judge as there are so many external instances that can provoke people to extremes that God will judge and weigh the heart in accordance.
Therefore, whether it is a “lie” to deny feelings is probably determinable on a fact-to-fact basis.
Psalm 51:7 states: Purify me with hyssop, and I shall be clean; Wash me, and I shall be whiter than snow.