Rabbi Tarfon would say:
You are not obligated to complete the work, but neither are you free to abandon it.
Do not be daunted by the enormity of the world's grief. Do justly, now. Love mercy, now. Walk humbly, now.
If you attend to Reality, you will receive great reward; for effort itself is good fortune.
Reality can be trusted to pay you the value of your work; every deed has a consequence.
And know this— the payment of the righteous is tranquility: knowing that “this, too, shall pass.”
— Pirkei Avot II:20 via R. Rami M. Shapiro