If you sit down at set of sun
And count the acts that you have done,
And, counting, find
One self-denying deed, one word
That eased the heart of him who heard, 
One glance most kind
That fell like sunshine where it went —
Then you may count that day well spent.

But if, through all the livelong day,
You've cheered no heart, by yea or nay —
If, through it all
You've nothing done that you can trace
That brought the sunshine to one face—
No act most small
That helped some soul and nothing cost —
Then count that day as worse than lost.

More information on George Eliot