“Sea” evaporates, “salt” endures.
Ordinary experience is – something like a voyage through crest and troughs of the ocean. And if, you are strong enough, will hold your life together during challenging times.
Serious spiritual experience, however, is different. It’s when there’s no sea left to continue the voyage. It’s when (short-term) highs and lows no longer exist. You’re standing on the sand. No matter what you do, the ‘Salt’ seems to have the last word.