The 'depraved' human condition was acknowledged for centuries past because it is so obviously true. Here Isaiah shows human unreasonableness before God, alienation, rebellion, and inability to change. Here also is the way to find God's forgiveness and life-changing power. 

A symbolic act with four moving lessons for the future apostles, just before Christ went to Calvary, showing his love for his own, his coming humiliation, his cleansing of them, and the humility of bearing and life (essential to them and all believers in order to be used by God).

The profound meaning of 'now is the judgement of this world', and the scornful questions of the masses, revealing their problem, then the Lord's last great appeal before Calvary, then the mysterious hardening of the heart of the people, plus green shoots of conversion. 

Through four striking illustrations Solomon considers spiritual 'skills': a noble building showing the three stages of spiritual life, warfare showing strategies for resisting Satan, the uninitiated builder or soldier showing hopeless consequences, and the need for constant exercise of spiritual skills.

As far as human beings are concerned, the multitude of God's tender mercies are the towering wonder of His divine attributes. Here are His mercies of salvation, their benefits, the great cost to God of their implementation, and the happiness of receiving them.