And God said: “Let there be lights in the firmament of the heaven to divide the day from the night; and let them be for signs, and for seasons, and for days and years; and let them be for lights in the firmament of the heaven to give light on the earth.” And it was so. Gen 1:14-15
The primitive root
yud י = the closed hand, thus work, throw, worship
ayin ע = the eye, thus watch, know, shade
dalet ד = the door, thus enter, move, hang
The story being told is the act (yud) which bears witness (ayin, as a witness testifies to that which he has seen) by entering in (dalet). When we gather at the appointed time and place to enter in to the tent of meeting (mo’ed) to worship, our lives bear a witness, which points out truth.