Charles Spurgeon Commentary Acts 22:1-2

"Brethren and fathers, hear ye the defence which I now make unto you. And when they heard that he spake unto them in the Hebrew language, they were the more quiet: and he saith," — Acts 22:1-2 (ASV)

People like to be addressed in their own language; they give the more heed to the message if it is spoken to them in words that they can understand.