What does it mean to be filled with the fullness of God?

In Ephesians 3:19, Paul expresses a desire for believers to be filled with the fullness of God, which implies a deep spiritual saturation in Him. To be filled entails allowing Christ and His attributes to permeate every aspect of a believer's life. Paul illustrates this by comparing it to a bucket submerged in water, where the bucket's contents become indistinguishable from the water itself. This fullness represents the believer's completion in Christ, where every spiritual need is met through Him. Consequently, being filled with God's fullness equips believers to withstand life's challenges by relying fully on His grace and strength.