How do we know fasting is important for Christians?

Fasting is mentioned in the Bible as a significant spiritual discipline for believers. In Matthew 6:16-18, Jesus mentions fasting, indicating that it is expected ('when you fast'), and emphasizes that it should be done discreetly, not to attract attention or admiration from others. This practice of self-denial serves as an expression of dependence on God and a means to draw closer to Him. The act of fasting reflects a deeper realization of one's need for grace and helps believers focus on God rather than worldly pleasures, thus playing a vital role in spiritual growth and devotion.