“What if someone finds out?” ... Behold, you are a new creation in Christ Jesus. Old things are passed away. All things are become new. When you are born again, from above, you are a new creation, a babe in His Family, so His Holy Spirit indwells you to ‘raise you up in the Way that you should go.’ Paul liked that ‘metaphor’ so much he referred to babes and milk waiting their growth so he could offer meat.
I remember THIS part: ...and be sure your sin will find you out.
So I decided to look it up...
Numbers 32:
20 Then Moses said to them: “If you do this thing, if you arm yourselves before the Lord for the war, 21 and all your armed men cross over the Jordan before the Lord until He has driven out His enemies from before Him, 22 and the land is subdued before the Lord, then afterward you may return and be blameless before the Lord and before Israel; and this land shall be your possession before the Lord. 23 But if you do not do so, then take note, you have sinned against the Lord; and be sure your sin will find you out. 24 Build cities for your little ones and folds for your sheep, and do what has proceeded out of your mouth.”
It's a bit different when you read it in context!