to achieve a host of neglected ambitions

Time for me is now double-edged: every day brings me further from the low of my last relapse
but closer to the next recurrence—and, eventually, death. Perhaps later than I think, but certainly
sooner than I desire. There are, I imagine, two responses to that realization. The most obvious might
be an impulse to frantic activity: to “live life to its fullest,” to travel, to dine, to achieve a host of
neglected ambitions. Part of the cruelty of cancer, though, is not only that it limits your time; it also
limits your energy, vastly reducing the amount you can squeeze into a day. It is a tired hare who now
races. And even if I had the energy, I prefer a more tortoiselike approach. I plod, I ponder. Some
days, I simply persist.
what does"to achieve a host of
neglected ambitions" mean?
thanks in advance.