pursue tranquility
Note: avoidance of negative issues
They thought people should enjoy the good things life has to offer, including friendship and wealth, but only if they did not cling to these good things. Indeed, they thought we should periodically interrupt our enjoyment of what life has to offer to spend time contemplating the loss of whatever it is we are enjoying.
Note: what it means to be a stoic
ANY THOUGHTFUL PERSON will periodically contemplate the bad things that can happen to him.
Note: contemplation as a preventive tool
One reason children are capable of joy is because they take almost nothing for granted. To them, the world is wonderfully new and surprising.
Note: this links to the idea that time speeds up as you get older as nothing is really "new", you've hedonistically adapted to events and experiences