'Walk' in the Bible

But chiefly them that walk after the flesh in the lust of uncleanness, and despise government. Presumptuous are they, selfwilled, they are not afraid to speak evil of dignities.

For while speaking great highflown words of vanity, they allure with the lusts of the flesh, by dissoluteness, those who have just fled those who walk in error,

First of all, know [without any doubt] that mockers will come in the last days with their mocking, following after their own human desires