" … I do not feel that life is a downhill run. Nor do I think of it as an arc that rises steadily until it reaches its apogee, tapers, and arches back to earth. The fate we choose is inscribed in multiple flights. Some follow the gravity of rise and fall, while others - those of the spirit for example - may never head downward, but climb steadily to the end, where they just drop cliff-like into the dark.
Consequently, there is no right time for last words, no point of demarcation for our adieux. There is no designated moment to set down the summary thoughts of a mind still counting. Whether you begin to die at the beginning … or whether you burn brightly to the end, you can’t wait forever to pass to others what you have learned… "

― David Horowitz , The End of Time