both Zettelkasten and Spaced Repetition force users to review, rewrite and re-engage with the material
You can imagine creating cards about new habits ("Think of a new concrete situation in which I’ll have trouble leaving space for others to speak.") or values ("What's an unusual recent situation in which you thought on the century scale?").
this seems like a very interesting idea, I sometimes kept short one-sentence "meditations" on the top of my work file, but being reminded about few of them at different times might be beneficial to let them "sink in"