Truth can actually hurt people rather than help them and heal them, if it's spoken in the wrong spirit. Jesus warned his disciples to be careful to discern what spirit they were walking in -  "But he turned, and rebuked them, and said, you know not what manner of spirit you are of".

A prophecy can be accurate, and yet, if spoken in the wrong spirit, can do great harm. A rebuke or correction, if not done in love and in the spirit of meekness, can harm rather than help. Satan spoke truth to Jesus -  but it would have greatly harmed Jesus, if he had taken it to heart, and obeyed that truth, when spoken by Satan, for Satan was not "rightly dividing" nor discerning the Word of God, correctly.  If we speak truth from a proud and arrogant heart, it can have the opposite effect on the hearer. It can drive them away from Christ,  rather than draw them to Him. It can wound them, if not spoken of with humility and love. Some stand on a street corner and shout at the people passing by -  "REPENT! Turn from your sin or perish and burn in hell forever!" This is truth. But if they're standing there, proud of themselves that they're "obeying God" and "doing evangelism " but they don't really love the poor souls passing them by, then they're wasting their time. People can sense their pride, their "I'm better than you" attitude. "i'm saved, I'm holy - and you're not", but say those same words with tears in their eyes, as they weep for the lost, say them with compassion and love, and see people respond quite differently. "That the righteousness of the Law might be fulfilled in us, who walk not after the flesh, but after the Spirit" We must walk after the Spirit of love, gentleness,  meekness,  longsuffering,  faith and joy, etc., for against such there is no law but the perfect law of liberty in Christ Jesus- and when people taste of that fruit  -  the fruit of the Spirit of Truth, when they hear the truth wrapped in the fruit, it makes it much more palatable.  Amen. It tastes the way it should. When Satan speaks it, it leaves a bad taste in our hearts. Not only should we discern what spirit we are of, but we should also discern what spirit others are walking in, and talking in, also.