So as we see kusala such as parami are accumlated life by life, aeon by aeon- the insight we develop this life is not lost.
The bad news is that akusala is also accumulated, the wrong view, the ignorance, the lust.
Fortunately merit is said to be more powerful
III. The Cutting Off of Perplexity (p. 116 Translation Horner, Milinda’s questions)
(vii) The King said: " Revered Nagasena, which is the
greater, merit or demerit ?"2
"Merit, [84] sire, is the greater, demerit is a trifle."
" In what way f’
“Sire, (someone) doing demerit is remorseful and sayH,
’ An evil deed was done by me '-therefore evil does not
increase. But (someone), sire, doing merit, is not
remorseful. Rapture is born of the absence of remorse,
joy is born of rapture, the body of one who is joyful is
impassible, when the body is impassible, he experiences
happiness, the mind of one who is happy is concentrated,
3 and he who is concentrated comprehends as it
really is-in this way merit increases.4 If a man who
has had his hands and feet cut off, sire, had given
(merely) one handful of lotuses to the Lord, he will not
go to the Downfall for ninety-one eons. 5 It is for this
reason that I say merit is the greater, demerit a trifle.”
“You are dexterous, revered Nagasena.”