What is contrary to a Christian's trustworthiness?

Swearing of oaths is considered contrary to a Christian's trustworthiness because it's seen as an indication that a person cannot be trusted to speak the truth without an added form of assurance. In the teachings of Jesus, particularly in the Sermon on the Mount, He emphasizes that one’s yes should be yes, and one’s no should be no, suggesting that believers should be known for their integrity and truthfulness. The reliance on oaths might imply a lack of sincerity in everyday speech, undermining the foundational Christian virtue of honesty.

In contrast, living in the Spirit, demonstrating love, and practicing forgiveness are all integral aspects of a trustworthy Christian character. These behaviors reflect a commitment to the principles of faith, fostering a reputation that aligns with a trustworthy and dependable demeanor. Therefore, swearing oaths disrupts the authenticity of a believer's communication and diminishes their overall trustworthiness.