What is willful sin? And, how would you define the opposite of willful sin?
Willful,...Intentional, with forethought, and from the dictionary, done on purpose, intended, etc.
Opposite of willful, unintentional, with out forethought, not done on purpose, not intended.
Example, your channel surfing late at night, you are the only one up, and you come on a sexual scene, how long does it take you to send a message to the remote, that this will hurt me spiritually if I watch it, and even though you did see it, it wasn't willful, but if you know to switch channels, and instead you continue to watch it, that is willful, and you are loosing a little of your Holy Spirit, and your human Spirit is growing again.
IMO, One Spirit is always growing in us, and our hope is that the Holy Spirit will eventually be the dominating one. That’s just my personal opinion, and the way I think of it that helps me to overcome my carnal pulls of the flesh.
I also feel that once you have God's Spirit, you may not allow it to grow as much as you should, but it never leaves you, or dies, and when we are quickened, our Spirit glory will be in size , proportion to our Holy Spirit that we have been hopefully allowing to grow since the inception of it.
Our brightness in our Glorified bodies will be in direct proportions to our good works we have done in our lifetime, and how much of God's Spirit has grown within us.
This is from no doctrine I have ever read, simply what God's Spirit reveals to me to encourage me to keep on.