1.  Dishonesty – The Pharisees were not honest with themselves or others.
2.  Doubt – It was not that they could not but that they would not believe.
3.  Denial – The Pharisees would not see their need of Jesus.  They would not admit that they were in the darkness of sin.

“If we say that we have fellowship with Him and walk in darkness we lie and do not the truth.  But if we walk in the light as He is in the light we have fellowship one with another and the blood of Jesus Christ His Son cleanseth us from all sin. If we say that we have no sin we deceive ourselves and the truth is not in us.”