Rest, if you must, but don't you quit.

When things go wrong, as they sometimes will,
When the road you’re trudging seems all uphill,
When the funds are low and the debts are high,
And you want to smile, but you have to sigh,
When care is pressing you down a bit,
Rest, if you must, but don’t you quit.

Source

Not only am I working on learning this to myself, but also to my children.