Text, meaning, and application

What does «تَحْرِيفَ الْغَالِينَ» mean?

Steadfastness in Faith, Protection from Trials, and Trustworthy Transmission of Knowledge (Reports 1–6)

• Merely memorizing words
• Elegant Arabic calligraphy
• Distortion by those who go to extremes
• Introductory study of grammar