Time
Decide what it means to you and how you plan to use it. To better yourself or others? We never seem to have enough of it. And when you think you do, it only slips away to be yearned for again. So with this time that is given to you make it count. Like a simple old cliche “Make the most of it”. Maybe even for yourself at first. Like they explain on an airplane. First put the mask on yourself, then small children. So give yourself a true understanding of time.
Then once you have mastered that share it with others.