What does it mean to labor to enter into Christ's rest?

Laboring to enter into Christ's rest (Hebrews 4:11) speaks to the intense effort required to shift our mindset from self-reliance to dependence on Christ. This doesn't mean working harder to gain acceptance; rather, it calls us to fight against the inclination to rely on our efforts. It is a spiritual discipline of fixing our gaze on Christ, embracing His complete work for us, and resting in the assurance that everything we need for salvation and sanctification is fulfilled in Him. This labor is essentially a continual fight to focus our hearts and minds on the sufficiency of Christ in our lives.