In many industries and fields, speaking the truth isn't well-received because lies align with the beliefs of the masses and serve the interests of those in power.
Lying may be able to temporarily gain an important position, but its long-term effects are far more dangerous. You may have earned a great reputation at work, but one lie can ruin your entire personal reputation. So, it is never a good idea to damage your self-respect by telling a lie or two. Therefore, everyone should develop the honest habit of speaking the truth.