It strengthens his faith.
Knowledge strengthens love, as well as faith.
Knowledge opens the door, and then through that door we see our Saviour. Or, to use another similitude, knowledge paints the portrait of Jesus, and when we see that portrait then we love Him, we cannot love a Christ whom we do not know, at least, in some degree. Knowledge also strengthens hope. Knowledge supplies us reasons for patience. Nor is there one single grace of the Christian which, under God, will not be fostered and brought to perfection by holy knowledge.