Sentence:  When that fear has been removed by faith in Jesus Christ , when we <WSD>know</WSD> that He is our Savior , that He has paid our debt with His blood , that He has met the demands of God 's justice and thus has turned His wrath away - when we know that , we have peace with God in our hearts ; and then , with this God on our side , we can face the whole world without fear . 
Meaning of the word marked with <WSD> tags:  be aware of the truth of something; have a belief or faith in something; regard as true beyond any doubt