One who is afraid can never be responsible.

Feel wanted or unwanted, alertness should always be in 360 degrees.

To be alert means to be alert in 360 degrees only.

Because one simple gap is enough for you to be defeated.

For a Ronaldo one simple gap is more than enough to put a goal in.

*******

The thieves may not or will not come at all.

Still you are always keeping your doors closed.

Why?

Because that is the meaning of being alert in life. 

That is the meaning of being alert in 360 degrees.

If possible, not leaving even one degree/ percent for chances.

*******

At the same time, alertness shouldn't be mistaken for fear.

One who is afraid can't be alert.

Mere fear or mere element of fear will cut you off the brain or off brain's spontaneous reaction / response. Off the alertness.

You have to know, one's ability to respond is his responsibility.

And one who is afraid can never be fully responsible.

Only one who is alert is the one who is responsible too.

******

In becoming alert there is no question of necessary and unnecessary.

What you consider as unnecessary may become in alertness necessary.