Odhiambo, I found some saints quotes on your topic of the world, the flesh and the devil.
I think about this a lot and I sure fall down a lot in this area!
The battle is in the heart! Thanks be to God, I am not totally lost all the time.
"The intellect will go on looking for sensual pleasures until you subjugate the flesh and devote yourself to contemplation."
St. Thalassios The Libyan
"Who could count all those who had wealth, power, honor?
But their glory, their riches were only lent to them and they wore themselves out in preserving and increasing that which they were forced to abandon one day.
_St. Ignatius of Loyola
These are a few, I will look for more.
God Bless you, my friend!