Why was it fitting for Christ to Institute the 7 Sacraments He Instituted?

      There are three main explanations given for the fittingness of the seven sacraments. One explanation draws an analogy between what is needed for natural life and supernatural life. Another explanation ties the seven sacraments to the seven virtues. A third explanation views the fittingness of the seven sacraments as a remedy for different aspects of sin.
      In the natural life there are certain things required for man to survive. Analogously it follows that there are certain things required for supernatural life. In the natural world there is a necessity of birth, nourishment, growth, healing when one gets sick, a preparation for death, and a need in the human world for marriage and government. Analogously there is a necessity in the spiritual life for spiritual rebirth in baptism, spiritual nourishment in the Eucharist, spiritual growth through the sacrament of Confirmation, spiritual healing through the sacrament of Reconciliation, a spiritual preparation for death through the sacrament of Anointing of the Sick, the raising up of marriage through the sacrament of matrimony and a spiritual governance through the sacrament of Holy Orders.  
      A different view on the fittingness of the seven sacraments highlights the relationship between the seven sacraments and the seven virtues of faith, hope, charity, prudence, justice, temperance, and fortitude. Baptism corresponds to faith, Anointing of the Sick to hope, the Eucharist to charity. Further Prudence is ordered Holy Orders, justice to the Sacrament of Reconciliation, Marriage to temperance and fortitude to Confirmation.
      A third view sees fittingness for seven sacraments by understanding them as healing for different sin of man. Baptism is understood as a cure for the lack of a spiritual life, Confirmation for the weaknesses that still exist in the soul after Baptism, the Eucharist against a tendency to sin, Confession against sins committed, Anointing of the Sick to the effects of sins already forgiven in Confession, Marriage as a cure for concupiscence and Holy Orders against divisions in the community.