We know Christ is all we have based on His sufficiency to meet all our needs and His work on the cross.
We recognize that Christ is our all through His perfect and complete work on the cross, which fulfilled all righteousness required by the law. Isaiah 10:20 reminds us that the remnant shall trust in the Lord alone, illustrating that there is no other source of hope for believers. The assurance lies in Christ's promise, as stated in John 14:6, that He is the way, the truth, and the life. This means that apart from Him, we can do nothing (John 15:5). Each believer must examine whether they are relying on Christ alone or mixing their faith with works, illuminating the importance of understanding that Christ's sacrifice is sufficient to save and sustain us fully.
Scripture References:
Isaiah 10:20, John 14:6, John 15:5
Commentary