Without passion in their hearts…

Those who believe that they believe in God, but without passion in their hearts, without anguish of mind, without uncertainty, without doubt, without an element of despair even in their consolation, believe only in the God idea, not in God himself.
–Miguel de Unamuno (1864-1936)

And so the grace…

And so the grace of God always co-operates with our will for its advantage, and in all things, protects and defends it, in such a way as sometimes even to require and look for some efforts of good will from it that it may not appear to confer its gifts on one who is asleep or relaxed in sluggish ease.
–Saint John Cassian (c. 360-435)