How do we know that God uses the weak to accomplish His plans?

In 1 Corinthians 1:27-29, Paul emphasizes that God has chosen the foolish things of the world to confound the wise, and the weak things to shame the mighty. This is consistent throughout biblical history; for instance, David was a shepherd boy chosen to be king, and the disciples were often fishermen with little theological training. This choice reflects God's grace in that He does not require human strength or wisdom to achieve His purposes. Instead, He often picks those who are overlooked or deemed unqualified to display His power and glory through their lives and actions. Recognizing this can offer great hope and encouragement to believers who may feel inadequate in serving God.