Never let life's hardships disturb you. No one can avoid problems, not even saints or sages.
If you light a lantern for another, it will also brighten your own way
If one lights a fire for others, one will brighten one's own way.
One should become the master of one's mind rather than let one's mind master him.
It is the heart that is important.
Suffer what there is to suffer. Enjoy what there is to enjoy. Regard both suffering and joy as facts of life.