In my words... to be truly sorry, and to turn from your sin.
This is off Google and I agree with it...
Repentance is reviewing one's actions and feeling contrition or regret for past or present wrongdoings, which is accompanied by commitment to and actual actions that show and prove a change for the better.
The discussion of the four soils brought to mind and compelled me to search the phrase, 'repent of your unbelief' and I came up on an AI generated summary to the question "What is the root cause of unbelief" and seeing 'the root' mentioned, I read further where the 1. reason given had to do with 'desire and preference,' or, iow, a favoring of one's personal will..."rather than submit to God's will..."
The example of the man that said, "Lord, I believe. Help thou my unbelief," strikes me as his recognition of the rocks in the soil of his heart and a plea for help in removing them. And it occurred to me that anyone rarely walks up on an entirely 'good' patch of soil without noticing either rocks, thorns, if not also 'tread marks' or birds nearby.