I learned from the radio the other day that there are three kinds of tears.
Yes, the chemical make-up of our tears are all different.
First, we have tears that lubricate the eyes and in addition they contain a low level antibacterial agent to cleanse.
Second, and different in chemical make-up from our lubricating tears, are our tears of sorrow.
And thirdly, and also chemically distinct from the others, are our tears of joy.
"Great are the works of the Lord." Ps. 111:2
I found that worth pondering, in light of our Great God, and also wondered where a Darwinist would put that in the chain of evolution.