'Watchful' in the Bible

Jesus began to say to them, “Be careful and see to it that no one misleads you.

Therefore be watchful all the time, praying that you may be counted worthy to escape all these things that will happen, and to stand before the Son of Man."

with all prayer and requests, praying at all times in the Spirit, and being watchful to this end in all perseverance and requests for all the saints:

So then let us not sleep [in spiritual indifference] as the rest [of the world does], but let us keep wide awake [alert and cautious] and let us be sober [self-controlled, calm, and wise].

But the end of all things is drawn nigh: be sober therefore, and be watchful unto prayers;

Be sober, be watchful: your adversary the devil, as a roaring lion, walketh about, seeking whom he may devour,

Be watchful, and strengthen the things which remain, that are ready to die: for I have not found thy works perfect before God.