'Forcible' in the Bible

How forcible are right words! but what doth your arguing reprove?

Then one of the Scribes, who had heard them disputing and well knew that Jesus had given them an answer to the point, and a forcible one, came forward and asked Him, "Which is the chief of all the Commandments?"

For they say "His letters are authoritative and forcible, but his personal presence is unimpressive, and as for eloquence, he has none."