By vehement desire…

The grace of contemplation is granted only in response to a longing an importunate (burning) desire: Nevertheless, God will not present Himself, even in passing, to every soul; but only to that soul which is shown, by great devotion, vehement desire, and tender affection, to be His bride, and to be worthy that the Word in all His beauty should visit her as a Bridegroom.
–Saint Bernard of Clairvaux (1090-1153)