"Hair" is a symbol of the number, the multitude of impeccable thoughts and good deeds done by a man who does the Will of God, His Commandments.

"Hair" is a symbol of the great magnitude, the significance of man's spiritual power in his ability to overcome evil, wickedness by knowledge, fulfillment, proclamation of the Truth of God's Commandments.  

"Hair" of Jesus Christ is a symbol of the multitude, the number of the righteous, the followers, the evangelists of His Teachings.

Negative Meaning.  

"Hair" is a symbol of the multitude of sins of the wicked man, the multitude of his committed iniquities, wickedness, pride of arrogance, arrogance, glory.