Matthew Poole and continuators on Jude 1:12

12 These are spots in your feasts of charity when they feast with you, feeding themselves without fear : clouds they are without water carried about of winds , trees whose fruit withereth , without fruit , twice dead , plucked up by the roots .

See 2 Pet. 2.13.

Feasts used among the Primitive Christians, to shew their unity among themselves, and promote and maintain mutual Charity, and for relief of the Poor among them.

Unreasonably cramming themselves, without respect to God or the Church.

Empty, making a shew of what they have not, Prov. 25.14. and inconstant, see 2 Pet. 2.17.

He compares them to Trees, which having Leaves and Blossoms, make a shew of Fruit, but cast it, or never bring it to maturity, or it rots instead of ripening; so these here make a shew of Truth and Holiness, but all comes to nothing.

Without any good fruit, (which only deserves to be called good fruit) brought forth by them, either in themselves or followers, who never get any real benefit by them.

Wholly Dead; Dead over and over; Dead by Nature, and Dead by that hardness of Heart they have contracted; or, that reprobate sense to which God hath given them up.

And so never like to bear Fruit, and fit only for the Fire; it notes the incurableness of their Apostacy, and their nearness to Destruction.

Marginal references: Prov. 25.14.