Concupiscence

[6] He taught that Adam's sin[a] is transmitted by concupiscence, or "hurtful desire",[7][8] resulting in humanity becoming a massa damnāta (mass of perdition, condemned crowd), with much enfeebled, though not destroyed, freedom of will.

Baptism, the Catechism teaches, erases original sin and turns a man back towards God.

The Wesleyan–Arminian theology of the Methodist Churches, inclusive of the Wesleyan-Holiness movement, teaches that humans, though being born with original sin, can turn to God as a result of prevenient grace and do good; this prevenient grace convicts humans of the necessity of the new birth, through which he is justified and regenerated.

[11] After this, to willfully sin would be to fall from grace, though a person can be restored to fellowship with God through repentance.

In this book, he discusses how to reconcile the concupiscent and the irascible souls, balancing them to achieve happiness.