Per Tela, Per Ignes
Nec me praerupti montes, nec fulgura terrent,
Quo minus in summo vertice conspiciar.

Here is the vocabulary:
per - through, by way of
telum - weapon, dart, spear
ignis - fire
nec - and not, not
nec...nec... - neither...nor...
ego - I, me
praeruptus - steep
mons - mountain
fulgur - lightning
terreo - frighten, terrify
qui - who, which, that
minus - less
in - in, into
summus - highest, greatest, top
vertex - peak, summit
conspicio - observe; (pass.) be visible