How do we know that Christ's grace is sufficient?

In 2 Corinthians 12:9, Paul shares how God assured him that 'My grace is sufficient for you,' highlighting the truth that in every trial and tribulation, God's grace is more than adequate to sustain His people. Paul’s personal experiences, including persecution and suffering, were instrumental in teaching him this vital truth. Through these hardships, he learned reliance on Christ, which not only kept him humble but also reaffirmed that God’s grace is all-encompassing and perfectly suited for our needs in every circumstance.