"a discursive mishmash of advice I wish I'd had the ears to hear in the year or five after graduating from college"
Clearly, this means "advice I wish I'd been ready enough, or open minded enough to listen to".
Is this a common idiom? I've not come across it elsewhere.
Does it have any particular origins? I wonder whether it's related to this Bible verse:
"He that hath ears to hear, let him hear."