Christ has indeed made the Gospel plain - as have others throughout Scripture. Why, then, do Catholics insist that it is Christ + works which save? It is NOT, as Scripture elucidates time after time. I do wonder, then, why change Christ’s words? Why indeed?!
Christ alone saves you -- Paul says "work out your own salvation with fear and trembling". What this is, is clear -- Christ said "repent, believe, be baptised, eat of His flesh and blood and endure to the end"