'Notions' in the Bible

So we also, when spiritually we were children, were subject to the world's rudimentary notions, and were enslaved.

Now, however, having come to know God--or rather to be known by Him--how is it you are again turning back to weak and worthless rudimentary notions to which you are once more willing to be enslaved?

See to it that no one takes you captive through philosophy and empty deception [pseudo-intellectual babble], according to the tradition [and musings] of mere men, following the elementary principles of this world, rather than following [the truth—the teachings of] Christ.

Let no one who delights in humility and the worship of angels pass judgment on you. That person goes on at great lengths about what he has supposedly seen, but he is puffed up with empty notions by his fleshly mind.

If you have died with Christ to the elementary principles of the world, why, as if you were still living in the world, do you submit to rules and regulations, such as,