We stare at broken clocks, the hands don't turn any more.
This is what makes the world look so sad an lonely. The time that passed is one of the few things in life we may never get back, no matter what we have or what we do. Therefore, time is an incredibly precious thing. Probably, the most precious thing ever. Sharing time with people is a sacrifice as long as we consider the time we spent with human beings lost. If we regarded it as a gift, something insubstantial but something so very meaningful at the same time, we would not feel like we are wasting our time whenever we interact with other persons.
Time is not an easy matter.