Hebrews  6:1-6. Chiastic structure copied from Chiastic Analysis of the Epistle to the Hebrews,  arranged by John Bligh (Athenaeum Press, Heythrop College, Oxon, England: 1966). Bligh's work is almost entirely in Greek. For website purposes, I have used unaccented Greek from the Unbound Bible, Nestle-Aland 26, at unbound.biola.edu
I have added English from the New American Standard Bible, revised.

A 6:1a dio afenteV ton thV archV tou cristou logon epi thn teleiothta ferwmeqa
Therefore leaving the elementary teaching about the Christ, let us press on to maturity,

mh palin qemelion kataballomenoi metanoiaV apo nekrwn ergwn 
not laying again a foundation of repentance from dead works

B kai pistewV epi qeon  and of faith toward God,
C 2 baptismwn didachV   of instruction about washings 
D epiqesewV te ceirwn and laying on of hands, 
E anastasewV te nekrwn  and the resurrection of the dead 
F kai krimatoV aiwniou  and eternal judgment.
G kai touto poihsomen  And this we will do, 
H eanper epitreph o qeoV  if God permits.
G* 4 adunaton gar  For ... it is impossible 
F* touV apax fwtisqentaV 
[
in the case] of those who have once been enlightened 
E* geusamenouV te thV dwreaV thV epouraniou 
and have tasted of the heavenly gift 
D* kai metocouV genhqentaV pneumatoV agiou
and have been made partakers of the Holy Spirit,
C* 5 kai kalon geusamenouV qeou rhma dunameiV te mellontoV aiwnoV 
and have tasted the good word of God and the powers of the age to come,
B* 6 kai parapesontaV   and then have fallen away,
A* palin anakainizein eiV metanoian 
to renew them again to repentance, 

anastaurountaV eautoiV ton uion tou qeou kai paradeigmatizontaV
since they again crucify to themselves the Son of God and put Him to open shame.