The plain fact is that we live to die and die to live but no one leaves life alive.
Death, be not proud, though some have called thee
Mighty and dreadful, for thou art not so;
For those whom thou think'st thou dost overthrow
Die not, poor Death, nor yet canst thou kill me...
One short sleep past, we wake eternally
And death shall be no more; Death, thou shalt die.

The plain fact,is of course,that nobody knows what causes a malignant tumor. The origin of life is not more mysterious. The causation of cancer is the greatest and most formidable of all the unknowns of modern science -DEATH BE NOT PROUD. Culled from both the poem and the book