Charles Spurgeon Commentary 2 Peter 1:9-10

"For he that lacketh these things is blind, seeing only what is near, having forgotten the cleansing from his old sins. Wherefore, brethren, give the more diligence to make your calling and election sure: for if ye do these things, ye shall never stumble:" — 2 Peter 1:9-10 (ASV)

But he who lacks these things is blind, and cannot see afar off, and has forgotten that he was purged from his old sins.

Therefore, brothers, give diligence to make your calling and election sure: for if you do these things, you will never fall:

He who is diligent in seeking these graces is kept from falling.

Every Christian is safe from a final fall, but he is not safe from a foul fall unless he is kept by grace.