lose heart

One specific kind of emergency is at the heart of this, such as when an airplane suffers a loss of stability at night.

The blood that accused his friend in his heart, rushed to his face, when he repeated what had been told him.

After all, may not even John Burns be human; may not Mr. Chamberlain himself have a heart that can feel for another?

Turn away from sin and order thy hands aright, and cleanse thy heart from all offence.

Her heart fluttered violently with fear as she saw that he stepped out after her, and walked by her side toward the house.

For of sadness cometh death, and it overwhelmeth the strength, and the sorrow of the heart boweth down the neck.