Knowing the Real will avoid falling for the fake

Experts in diamonds, money, antiques, and art are trained in how to know the real/authentic.  There may be endless ways that counterfeiters try to fake "the real thing."  In order to recognize the counterfeit, one must be trained and know the real.

2 Peter is a letter to the church about knowing the real God revealed in His Son, Jesus the Christ.  Essential knowledge to keep from being fooled by probable impostors and false teachings.

The end of 2 Peters says this:

2 Peter 3:17 Therefore, dear friends, since you already know this, be on your guard so that you may not be carried away by the error of lawless men and fall from your secure position.18 But grow in the grace and knowledge of our Lord and Savior Jesus Christ.

The way we keep on our guard is keep grow in in the grace and knowledge of our Lord and Savior Jesus Christ.

Know him well and those impostors will fall way short of the real and so will false religion/teachings of man.