“Beloved, when I gave all diligence to write unto you of the common salvation, it was needful for me to write unto you, and exhort you that ye should earnestly contend for the faith which was once delivered unto the saints.” Jude 3
Spurgeon said, “I am preaching no new doctrine. Theology hath nothing new in it except that which is false.”
We must know the gospel so well that it is obvious and shocking when we hear a different gospel.
A Verse A Day 
This was a loveely blog post