Correct.  Keep up the good work.

And out of the smoke came forth locusts upon the earth; and power was given them, as the scorpions of the earth have power. ⁴And they were told that they should not hurt the grass of the earth, nor any green thing, nor any tree, but only the men who do not have the seal of God on their foreheads. Revelation 9:3-4 (NAS)

Here we see that the followers of God and the Lamb would be protected from the torment of these locusts.  What importance would this message have to those followers of Jesus who were being faithful to Him despite the tremendous persecution around them?

Remember what was said to the angels prior to them opening the 7th seal of the book?

...saying, "Do not harm the earth or the sea or the trees, until we have sealed the bond-servants of our God on their foreheads." Revelation 7:3 (NAS)

We now see the importance of the marks or seals on the foreheads of God's bond-servants.  The mark was a way of identifying them as belonging to God...to protect them.  Later in the Revelation we will see exactly what these marks or seals on the foreheads were.  The marks on the foreheads that John saw were probably not made as this picture shows (an ordinary ink stamp), but it may help us as we think about the things that John describes. 

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