Prudence

It is possible for the intellect, enlightended by faith, to know the truth about God, yet fail to see all the windings of the road we must tread to come to him and see how we should carry ourselves upon the road.  Prudence is the virtue by which the grace-aided soul sees the world as it actually is and our relation to it as it should be.  It is thus the virtue which enables the intellect to see what is right to do.