Blood is thicker than water is a medieval proverb in English that means that familial bonds will always be stronger than bonds of friendship or love.
I Samuel 20:16,17, “So Jonathan made (cut) a covenant with the house of David, saying , ‘Let the Lord even require it at the hand of David’s enemies. ‘ And Jonathan caused David to swear again, because he loved him: for he loved him as he loved his own soul.”
The saying “blood is thicker than water” means that familial bonds are strong, and will often outweigh other bonds or relationships. The phrase first appears ( in a slightly different form) in Reynard Fuchs (Reynard the Fox) written in Germany by Heinrich der Glîchezære in 1180.
That idiom is: Blood is thicker than water . Most people would characterize this as a way of saying that family relationships are the most important. The blood you share with your relatives represents a strong relationship. We call these family ties.
The origin of the modern variation is unknown. It is found in an Irish newspaper from 1868: ” They say curiosity killed a cat once”. Curiosity can do more things than kill a cat ; and if emotions, well recognized as feminine, are inimical to feline life, then jealousy would soon leave the whole world catless.
Blood is Thicker than Water means: People who are related have stronger obligations to each other than to people outside the family. Example of use : “When my best friend and my brother got in a fight I had to help my brother; blood is thicker than water .”
In doing this, it is reported that “ blood and water came out” (John 19:34), referring to the watery fluid surrounding the heart and lungs. While these unpleasant facts depict a brutal murder, the depth of Christ’s pain emphasizes the true extent of God’s love for His creation.
Whole blood has a much higher viscosity than water and therefore the slope of the flow-pressure relationship is less steep (see figure). Unlike water , blood is non-Newtonian because its viscosity increases at low flow velocities (e.g., during circulatory shock).
Whether a fluid floats or sinks in another fluid would depend on their specific gravities. If the specific gravity of blood were greater than that of salt water , the blood would sink ; otherwise it would float . Pure water , by definition, has a specific gravity of 1.