What labor is referred to in Hebrews 4:11 about entering God's rest?

Hebrews 4:11 exhorts believers to 'labor to enter into that rest,' which initially seems paradoxical. However, this labor is not about striving in the flesh but rather about the effort it takes to believe in the gospel. It involves battling our innate tendency towards unbelief and clinging to the truth of who Christ is and what He has accomplished. This labor is a spiritual one; it requires diligence to listen to the Word of God and to reflect upon the truth of His promises. Believers are encouraged to actively resist the urge to rely on their works and instead commit themselves to faith in Christ's completed redemption, as illustrated in the historical context of the Israelites who failed to enter the Promised Land due to unbelief.