What do you make of Christians who want to witness to others but can't even discipline themselves to write a proper 10-word sentence?

They feel they're so special and chosen...

They don't need to make any effort at all.

~

Amongst the group of people called Christians are very well educated people, people who have had very little education and many others in groups that come in between those two extremes. There is no link between a person's education and qualifications and their intelligence.  There might be some, like those to whom you refer in your question, but that just shows that God calls ALL groups of people to Him. 

We, who will spend eternity with our Lord in Heaven, will meet others there of all types. God will not be selecting according to your standards but according to His own.  There will be the fat and the skinny, the bald and the hairy, the toothless and the ivory smiles, the super intelligent and those that have had minimal education. 

If YOU don't make it there you'll wish that you had. Some of the best preachers ever heard have had minimal education. No-one needs a degree to tell others about God's love.

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Par for the course.

That they are typical of those worried about specks in other peoples eyes.