by sight
By appearance.
to know by sight
And last of all an Admiral came, A terrible man with a terrible name,- A name which you all know by sight very well, But which no one can speak, and no one can spell. Robert Southey
In Christ the original image of God is restored, by faith in this world and by sight in the world to come. Walter Lang
There are all these people here I don't know by sight or by name. And we pass alongside each other and don't have any connection. And they don't know me and I don't know them. And now I'm leaving town and there are all these people I will never know. Carson McCullers
When you see no present advantage, walk by faith and not by sight. Do God the honor to trust Him when it comes to matters of loss for the sake of principle. Charles Spurgeon
Supposing you knew - not by sight or by instinct, but by sheer intellectual knowledge, as I know the truth of a mathematical proposition - that what we call empty space was full, crammed. John Buchan
There is nobody I know by name who is concerned with collecting information for the Russian authorities. There are people whom I know by sight whom I trusted with my life. Klaus Fuchs