Definitions: (1) essential, indispensable, or requisite; (2) logically unavoidable; inevitable

Cultivation to the mind is as necessary as food to the body. — Marcus Tullius Cicero (106-43 BC) Roman statesman
• Start by doing what’s necessary; then do what’s possible; and suddenly you are doing the impossible. — Saint Francis of Assisi [born Giovanni Francesco di Bernardone] (1181-1226) Founder of the Franciscan Order
• The only thing necessary for the triumph of evil is for good men to do nothing. — Edmund Burke (1729-1797) Anglo-Irish politician
• To one who has faith, no explanation is necessary. To one without faith, no explanation is possible. — Thomas Aquinas (1225-1274) Italian theologian
     Note: Albeit, there must be some steps, a bridge that can be found, from ignorance of any positive quality to knowledge thereof.

Affirmation: I am necessary.