Be not backward in zeal; be fervent in spirit; serving the Lord.

This man had been instructed in the way of the Lord; and being fervent in spirit, he spoke and taught correctly the things concerning Jesus, knowing only the baptism of John.

And above all things have fervent love among yourselves; for love covereth a multitude of sins.

But the day of the Lord will come as a thief; in which the heavens will pass away with a great noise, and the elements will melt with fervent heat, and the earth and the works that are therein will be burned up.

looking for and hastening the coming of the day of God, by reason of which the heavens being on fire will be dissolved, and the elements will melt with fervent heat!