בראשית is שיר תאב, meaning a song with desire, that is the best of all songs and it is the Song of Songs for King Solomon. The king that has the peace, meaning Zeir Anpin. This song will be awakened when all negativity will be removed from the world.
Like it says in Psalms 119:174, “I have longed for your salvation YHVH…” תאבתי לישועתך.
This is the secret of Exodus 15:1 “Then Moses and the Israelites WILL sing.. ” “אז ישיר”. It not said “Then Moshe sang, but will sing, to imply to that this is a song for the future, for the final redemption.
When the gate opens and Moshe will sing his songs to bring down the light of the Binah and Chokmah and the prophecy that said “and the earth will be filled with the knowledge of YHVH” will be fulfilled.
This verse has the numerical value of 506, which is the same as the first 6 letter sequence of the 42 letter name and the same value as the last 5 letters of the 42 letters, which means Love for no reason, “אהבת חנם”.