to become completely known, felt, or understood I had to tell him what to do over and over before it finally sank in. The fact that she's left me still hasn't really sunk in.
Some people label this type of spending “impulsive.” Others use the word “urge” to describe the feeling that comes just before they whip out the plastic. You can cut up the credit cards, or just use cash and avoid having a debit card.
to welcome them into a group of friendly insiders. Although I've not heard it used of things, I could imagine that to bring a new idea or new proposal “into the fold” might be to welcome it and give it a friendly reception.