An excerpt from "Bible.org" entitled, "4. Blessed Are The Hungry (Matthew 5:6)" by Gregory Brown, states: "The words for “hunger” and “thirst” are not words used of somebody who is casually hungry and thirsty. They refer to someone who is starving for food and someone who will die without a drink.1 This is something most people from developed countries know nothing about. When we’re hungry, we open the refrigerator and grab a snack. If we’re thirsty, we pour a cup of water. But the ancient world, to whom Christ spoke, knew hunger and thirst well. Most families in Palestine could only eat meat once a week. Wages were low, if they existed at all, and did not allow for luxuries—it was just enough to survive. Travel often led people through large deserts with no water; therefore, thirst was a common companion.2 When a person is desperately hungry and thirsty, nothing else will satisfy them—not a beautiful sunrise or sunset, not entertainment or rest—only food and water will do.
The Greek words for “hunger” and “thirst” are present participles meaning a continual hungering and thirsting.3 There is a continual hunger and thirst in the life of true believers that separates them from the world. What is that hunger and thirst for? According to Christ, it is for righteousness." This article may be viewed at: Blessed are the Hungry/bible.org
Reference: Romans8:35