Nature has given innumerable gifts to man, time is one of them. Every person has knowledge of time. Not only that, a man knows what work should be done at what time. Thus a man has knowledge of both-time and the purpose of it. With this knowledge a man accomplishs many works in time, but which work should be in the fore front of the list of acts that are done by men. If such a question is asked by someone, the answer is to perform/to act at a proper time is the best purpose of all the purposes.
The meaning (of the above remark) is that it is good to finish work in time. If it is not done so and much time one spends to accomplish it, it is useless. Any work done in that manner can not be put in front. Any work done timely can only be put in the forefont.