Colossians 1:21-23 || Stable and Steadfast

Col 1.21-23 - Stable and Steadfast.jpg

How are we to understand a verse like Colossians 1:23? Does it teach us that salvation can be lost? Does it contradict verses like Philippians 1:6 and Romans 8:38-39? Or perhaps, do all these verses go hand in hand because they are the inspired Word of God?