כיבס ביין לבושו Wash his clothing in wine (Yaakov Avinu blessing his son, Yehuda, a'h)
Ohr HaChaim HaKadosh, zs'l, says on the Pasuk that if the Geula will come thru learning Torah, it'll be in a good, calm, rising way. Only Torah can prevent killing of Jews. If c'v we will not be occupied with learning Torah, The Geula will come with troubles and attacks and only after, Moshiach will come עני ורוכב על חמור (poor, and riding on a donkey).
Wine and Gog Umagog in Gematria are both 70. If Am Israel will learn Torah, it will like wine, delicious. But if Am Israel will not learn Torah, it will be Gog UMagog.
But for sure Moshiach will arrive.
Am Israel are now in a time of much pain and troubles, know that all efforts to go in the way of the Torah, will decrease the birthpang pains.
When Yaakov Avinu, a'h, was blessing his sons, he called them to tell them what will be at the End of Days. "האספו ואגידה לכם את אשר יקרא אתכם באחרית הימים" - Gather and I'll tell you what will happen with you at the End of Days. Chazal says that the condition of the Geula is in the word האספו gather. When Am Israel is as one unit, Achdut, they merit the Geula.
"When you arrive at the stones of pure marble, do not say 'water, water!' This is one of the letters HaRav Yitzchak Kaduri, z'sl, left us with.
GoodYid emailed info that it's from Gemara, Hagiga 14b, http://images.e-daf.com/DafImg.asp?ID=1556&size=1 . It's one of deepest mystical things in the Gemara.
Our Rabbis taught: Four entered the ‘Garden*’, namely, Ben Azzai and Ben Zoma, Aher, and Rabbi Akiva. Rabbi Akiva said to them: When you arrive at the stones of pure marble, do not say, water, water! For it is said: He that speaks falsely shall not be established before My eyes. Ben Azzai cast a look and died. Of him Scripture says: Precious in the sight of the Lord is the death of His saints. Ben Zoma looked and became demented. Of him Scripture says: Have you found honey? Eat as much as is sufficient for you, so you will be filled with it, and vomit it. Acher became an apostate. Rabbi Akiva departed unhurt.
*"Garden" (PRDS) as an acronym for four levels of interpretation: Peshat (a literal deduction), Remes (an allusive hint), Derush (interpretation uniting material from many passages), and Sod ("secret": a hidden connection).