# Like the cold of snow at harvest time is a faithful messenger

Here a faithful messenger is being compared to the cold of snow, because both are pleasant.

# the cold of snow

If your language has no word for snow, consider "cool, fresh, clean water."

# snow

white flakes of ice that fall from the sky like rain

# brings back the life of his masters

This means he makes his masters, who are weak and tired, to be strong and rested again.