God is a fire…

God is a fire that warms and kindles the heart and inward parts. And so, if we feel in our hearts coldness, which is from the devil, – for the devil is cold – then let us call upon the Lord, and He will come and warm our hearts with perfect love not only for Him, but for our neighbor as well. And from the presence of warmth the coldness of the hater of good will be driven away.
–Saint Seraphim of Sarov (1754-1833)

Thoughts of impurity…

In temptations against chastity, the spiritual masters advise us, not so much to contend with the bad thought, as to turn the mind to some spiritual, or, at least, indifferent object. It is useful to combat other bad thoughts face to face, but not thoughts of impurity.
–Saint Alphonsus Liguori (1696-1787)

Lose your appetite for sin…

All of the Israelites left Egypt, but in the desert many of them had second thoughts and wanted to return. In the same way, some resolve to avoid sin, but they look back at Sodom even while fleeing it. They give up their sins, but go right on talking about them, desiring them. If you want to live a devout life, you are not only required to stop sinning but also to lose your appetite for it.
–Saint Francis de Sales (1567-1622)

Food and drink…

For the good Creator made all things good and the Maker of the universe is one, Who made the heaven and the earth, the sea and all that is in them. Of which whatever is granted to man for food and drink, is holy and clean after its kind. But if it is taken with immoderate greed, it is the excess that disgraces the eaters and drinkers, not the nature of the food or drink that defiles them. For all things, as the Apostle says, are clean to the clean. But to the defiled and unbelieving nothing is clean, but their mind and conscience is defiled.
–Saint Leo the Great (c. 400-461)