To love God…

To love God as He ought to be loved, we must be detached from all temporal love. We must love nothing but Him, or if we love anything else, we must love it only for His sake.
— Saint Peter Claver (1581-1654)

I wish for You alone…

When we hear people talk of riches, honors and amusements of the world, let us remember that all things have an end, and let us then say: ‘My God, I wish for You alone and nothing more.’
–Saint Alphonsus Liguori (1696-1787)

Denying oneself…

Those who reach the goal without falling do so through hating themselves and all worldly desires, distractions, pleasures and preoccupations, for this is what ‘denying oneself’ amounts to. Hence everyone expels himself from the kingdom by his own choice, through not embracing suffering and denying himself for the sake of the truth, but wanting to enjoy something of this world in addition to that divine longing, and not surrendering the whole inclination of his will to God.
— Saint Symeon Metaphrastis (Tenth Century)