It’s always okay to obey the Ten Commandments.
You cannot. In either thought, word, or deed you’d blow it. Besides, it’s not the Ten Commandments - it’s nine with a statement; plus the Ten are only a part of the full commandments of G-d to the Jews - there are over six hundred and if you blow one, you’ve blown them all. That’s what Yeshua did on the Cross - when He said “It is finished” He was saying He fulfilled all the commandments of G-d.