Meaning of Head and Tail

Is. 9:15 "The ancient and honourable, he is the head; and the prophet that teacheth lies, he is the tail."

The head comes first and is the most important, the most effective. The tail comes last and is utterly ineffective. The history of God's people...we start of with a bang and then fade over time. My question is: today, is the church the head or the tail?

well if the church teaches lies then it is the tail. Does it teach lies?

The church teaches the truth. Same of the people listen and then walks away and are the tail.