Do not lose heart, replied Socrates, and the day may come when you will understand.
Do not lose heart, Philip; he cannot last forever; and this week how ill he has been!
But don't you lose heart, Jim, for I'm sure this isn't the end of our story, by any means.
Do remember if you lose heart about your work, that none of it is lost.
At twenty yards they slowed down and stopped, seeming to lose heart.
But though Julien was unable to fight with so big an opponent, he did not lose heart.
When matters had come to this pass, I began for the first time to lose heart.
In spite of this, neither officers nor men appeared to lose heart.
We must not lose heart, or it will be the worse both for ourselves and for those whom we love.
A young soldier must not lose heart because he finds he is a prisoner.