Thomas A Kempis 1.6 on Temptation: Yielding to passion has no payoff

Of inordinate affections

Whenever a disordered desire comes to a man, he becomes restless. The proud and the greedy are never at rest, while the poor and humble of heart have the abundant protection of peace. The man who is not yet wholly dead to ego is soon tempted, and is overcome in small and low things. Weak in spirit and stronger in flesh, he leans toward the pleasures of the senses, and it is difficult for him to completely escape from earthly desires. And so he resists temptation sadly and grudgingly, and is easily angered at any opposition. 

But if he does pursue those desires, immediately he is weighed down by the condemnation of his conscience. He followed his desire, but it contributed nothing towards the peace that he pursued. It is not serving passion but resisting it that brings true peace of heart. And therefore there is no peace in the heart of a man who is carnal, no peace in the man who is dedicated to outward things, but in a passionately spiritual one.

Imitation of Christ by Thomas A Kempis, 1.6. 

Translation focused on contemporary English and preservation of rhetorical force and art