In a scene from a French police TV series ([Profilage](Profilage (TV Series 2009–2020) - IMDb)), Commander Rocher offers to share the secret of parenting with his colleague Chloé (a criminologist who adopts a young girl):
(paraphrase of Rocher's comment):
There is no secret to parenting. The work is to limit the damage. And do the best you can.
/ This is a good guideline for many projects //