I found this wallet with $400 in it and I really want to keep the money. That should be fine right?
No that's not right, you have to turn in the wallet and money to the police. Why do you want to keep that money?
I really could use the money and since I found it I should get to keep it.
The money belongs to someone else and you need to turn in the wallet and the cash to the police. It's not right to keep it and you'll feel guilty if you do.
I won't feel guilty, I'll have $400 to spend.
I know it seems like this is easy money but whoever lost the wallet with the money is probably devastated over the loss of the money. You'll be able to respect yourself more and do something good for someone else if you turn that wallet and cash in to the police.