Snap 21 is about direction 19, where Baxter describes real change as turning away from selfish desires and focusing on God. This requires a lifelong commitment to fighting your own ego and bad habits until your thoughts and actions are completely guided by God's will.
On our own, we can't do it. However, God does not ask us to do anything without providing first the grace that we need to have the strength and the will to accomplish it.
Yes, He remains faithful, though we are not. He is more reliable than us.
This direction tells us three things. The change is not just a one-time event; it’s a total redirection of life. The opposition too, against the old self, is constant. The ultimate goal is the replacement of one's own personal impulses with a mindset that follows divine guidance.
In short, the direction is about the cessation of living for oneself and the commencement of living for God, which requires a constant fight against your own ego every single day.