It means: Let the vigorous vitality run through the time you experience, and make every second of life fulfilling, instead of letting life disappear as time passes.

It can also be understood as: giving life to time, rather than giving time to life. Use your own experiences to enrich your time, rather than letting life pass by with time.

Extended information

Time is life comes from Lu Xun’s famous saying: Time is life, and wasting other people’s time for no reason is actually tantamount to seeking wealth and killing. Time is life. This sentence uses the rhetoric of metaphor, which is a type of metaphor. Comparing time to life illustrates the finiteness and shortness of time.

"Waste, the biggest waste is a waste of time." Edison often said to his assistant, "Life is too short, you have to think of more ways to do more things with less time."