The middah of Ahava from the sfarim hakdoshim.
Must we listen to Rabbis in non-halachic matters [from the Holy Klauzenberger].
Can prophecy still exist in our time? [But see Yeshivas Rabbeinu Yitzchak Elchanan's Beis Yitzchak journal Number 40 page 426 and on].
The Baal Shem Tov Hakadosh on viewing female beauty.
The Besht on where your thoughts should always be.