snowballs

Reading the wonderful Oulipo Compendium for the umpteenth time, and I keep having to put it down to have a go at different things. How about doing one of these snowball poems...?

I
am
the
text
which
begins
sparely,
assuming
magnitude
constantly,
perceptibly
proportional,
incorporating
unquestionable
incrementations

(I'm not sure I should even put it up here because I can't get it to format right - the I should be at the centre of the top and the rest spreading out pyramid style)