There's more love in this world than we are lead to believe.*
*Except for t.u.
"When you're at the end of your rope and ready to give up, just remember, you've overcome the hardest days/circumstances of your life so far. You can do it again." It sounds dark, but when I say it (or some variation based on the setting), it's in a matter-of-fact, upbeat tone meant to instill confidence in the person despite their perceptions of the task/obstacle/etc.