There is something even in the lapse of time by which time recovers itself.
(Henry David Thoreau (1817-1862), U.S. philosopher, author, naturalist. A Week on the Concord and Merrimack Rivers (1849), in The Writings of Henry David Thoreau, vol. 1, p. 374, Houghton Mifflin (1906).)
'One-dimensional time is death. In two dimensions, nothing is supposed to die. Complex time is material time. With complex time, there is an emergent 'life' variable. Life discovers life, death discovers death. Otherwise we are dealing with the first dimension of time: and such a view is not materially complex. For in all of time, life must be immortal, whereas in one increment of time, there is no opportunity to die...Therefore, where life is said to die, we always find 'change'. Change is simply the second dimension of time... Since the first dimension is death, death is not justified. Either there is one dimension, or two, or infinite. The safest view is that time is change of some kind- -it consists of life for the changeless, and when it changes, it cannot be dead.'
'Immortality or timelessness is difficult. The simplest method is to acquire youth.... Re-capturing history by time-traveling does not always reverse the aging process... Becoming timeless is the difficult part. Neither youthfulness nor time-travel necessarily results in timelessness, although both are related... You might try to create a time-loop in the same location, but this is about 1000 times more difficult than time travel, and might cost a lot of energy.'