sneak in

Gratitude has a funny way of sneaking in, even when you’re not paying attention.

He sneaked in “I’m not a good person” so innocuously that the old me would have overlooked it.

Eventually, Lillienfeld said, he planned to sneak in a tapped cellphone in hopes the real killer would confess.

He messaged a sibling of Holly's asking if they could help him "sneak in" but the sibling refused.

You know, just really unkind self thoughts that I try really hard not to harbor anymore, but they sneak in because we live in a fat-phobic society.