Trying to get rid of cancer and live longer in this earth?, ok good , but that's not the most important. At the end of the day you will be in the same place; no matter if you gained a couple of years more, you will face death. No matter if you die next week or next decade, your race in this earth will soon finish.
Psalm 90:9 For all our days are passed away in thy wrath: we spend our years as a tale that is told. 10 The days of our years are threescore years and ten; and if by reason of strength they be fourscore years, yet is their strength labour and sorrow; for it is soon cut off, and we fly away.
We also read the following:
Ecclesiastes 12:13 Let us hear the conclusion of the whole matter: Fear God, and keep his commandments: for this is the whole duty of man. 14 For God shall bring every work into judgment, with every secret thing, whether it be good, or whether it be evil.
What really matters is to do always good, obeying God, living for him, worshipping him, praising him, fearing him, loving him with all your heart, loving your neighbor as yourself:
Matthew 22:36 Master, which is the great commandment in the law? 37 Jesus said unto him, Thou shalt love the Lord thy God with all thy heart, and with all thy soul, and with all thy mind. 38 This is the first and great commandment. 39 And the second is like unto it, Thou shalt love thy neighbour as thyself. 40 On these two commandments hang all the law and the prophets.
So repent of all your sins and put your faith in Jesus for the salvation of your soul. His blood will cleanse you of all your sins. He is the lamb that was sacrificed for you. Then you will have eternal life. Choose to serve God, choose to have peace and joy from God. Be prepared for the final judgement.
Think about eternity and don't put your eyes in the vanity of this earthly life. Start reading the Bible and PUT IT INTO PRACTICE. Take that decision before it is too late, before you die or Christ Jesus comes first to judge this earth; whatever happens first.
Jesus said:
Matthew 7:24 Therefore whosoever heareth these sayings of mine, and doeth them, I will liken him unto a wise man, which built his house upon a rock: 25 And the rain descended, and the floods came, and the winds blew, and beat upon that house; and it fell not: for it was founded upon a rock. 26 And every one that heareth these sayings of mine, and doeth them not, shall be likened unto a foolish man, which built his house upon the sand: 27 And the rain descended, and the floods came, and the winds blew, and beat upon that house; and it fell: and great was the fall of it.