All Saints' (10) Jonathan Edwards

The kind of religion that God requires, and will accept, does not consist in weak, dull, and lifeless "wouldings"--those weak inclinations that lack convictions--that raise us but a little above indifference. God, in his word, greatly insists that we be in good earnest, fervent in spirit, and that our hearts be engaged vigorously in our religion: "Be fervent in spirit, serving the Lord" (Rom. 12:11, modified KJV).
"And now, O Israel, what does the Lord your God require of you? To fear the Lord your God, to walk in his ways, and to love him, and to serve the Lord your God with all your heart and with all your soul" (Deut. 10:12). This fervent, vigorous engagement of the heart is the fruit of a real circumcision of the heart that alone has the promise of life: "And the Lord your God will circumcise your heart, and the heart of your children, to love the Lord your God with all your heart and with all your soul that you may live" (Deut. 30:6).

--From Religious Affections

Currently available as a free downloadable audiobook at ChristianAudio.com. (It normally costs $29!) They refer to this book as "quite possibly one of the most important books ever written by America's greatest theologian."
CCEL says of Religious Affections:

In this classic work by America's greatest theologian

and philosopher, Edwards considers the nature

of revival and the genuine work of the Holy Spirit.

Don't read this book

if you want to keep worshipping your idols.