Jeremiah 17:9-10 The heart is deceitful above all things, and desperately wicked: who can know it? I the Lord search the heart, I try the reins, even to give every man according to his ways, and according to the fruit of his doings.

The Hebrew word for reins here is kilyah which by definition literally is the kidney veins and figuratively is the seat of emotions and affections. The kidney veins carry the blood to the  kidneys for removed of impurities. Think about that for a moment.

Try, as in trying the blood, is bachan in the Hebrews which means to examine, to scrutinize. So let us examine these verse from God’s point of view. Since God knows all things from the beginning to the end, He already has knowledge of the blood test.

When the doctor sends you to the lab for a blood draw to test your kidney function, do you know the results of the test before they come back? No, you don’t, but why did the doctor order the blood draw in the first place? Because you were symptomatic.

God knows you better than you know yourself. Now let us look at the placement of these verses in scripture. What Word did it follow?

Jeremiah 17:7-8 Blessed is the man that trusteth in the Lord, and whose hope the Lord is. For he shall be as a tree planted by the waters, and that spreadeth out her roots by the river, and shall not see when heat cometh, but her leaf shall be green; and shall not be careful in the year of drought, neither shall cease from yielding fruit.

There is your nominal standard for your blood test. Now you can see how you measure up.