The proverb means that if you wait time, you ruin your opportunity. Time is an abstract thing, you cannot really kill it as with a gun, arrow, knife, or whatever. Killing time can be attributed to waiting your time or managing your time poorly.
Opportunities are time bound; they do not remain or exist forever. As a pupil, if you do not manage your time properly by hurrying up in the morning, you may miss the morning school bus – boarding the school bus is an opportunity.
As a career woman or man, if you do not manage your time properly by waiting time on things that are not worthy of your time, many things will go wrong in your life; that is, you are left with little time, which you would either allot to your job or career to the neglect of your family. Or you would have to expend that time on your family, neglecting your career.
Time is the most expensive resource to have ever existed. Once you lose it you can never gain it back: it is neither sold nor bought. You can get back your gold, diamond, etc. if you lose it. But it is not so with time.
Ancient wisdom has discovered that opportunity walks with time. Whoever masters the proper management of his time would snatch many opportunities in life.
I have observed in the course of time that some students do not manage their time well in that they do not study at the time they should be studying. Eventually, they fail their exams and ruin their opportunity to continue their education. Now to get themselves back on track, they would have to do remedial, resit, or rewrite several exams.
Let’s respect time and manage it well.