Without a goal in life,
如果人生缺乏目标，
you will be going through life aimlessly and meaninglessly.
你将会漫无目的且毫无意义地度过一生。
What's more, all the work you do will be useless.
再者，你做的所有工作都是无用的。
As they say, "Have an aim in life or all of your energies will be wasted "
有道是：“人生若无目标，就会枉费一生。”