Be kind because every one is fighting a hard battle. Plato.

It is often easy to become consumed with our own thoughts, worries and problems. So much so that we often fail to take into account that everyone we meet may be experiencing difficulties of their own. There is an old saying: 'I cried when I had no shoes until I met a man with no feet'. It is respectful to everyone you meet to show compassion and understanding. Give that person your full and unwavering attention; you may even forgot your worries, for a while.