{I have a baptism} (aptisma de ech(935c)). Once again Jesus
will call his baptism the baptism of blood and will challenge
James and John to it ( Mr 10:32f.  Mt 20:22f. ). So here. "Having
used the metaphor of fire, Christ now uses the metaphor of water.
The one sets forth the result of his coming as it affects the
world, the other as it affects himself. The world is lit up with
flames and Christ is bathed in blood" (Plummer). {And how I am
straitened} (kai p(9373) sunechomai). See this same vivid verb
sunechomai in  Lu 8:37  Ac 18:5  Php 1:23  where Paul uses it
of his desire for death just as Jesus does here. The urge of the
Cross is upon Jesus at the moment of these words. We catch a
glimpse of the tremendous passion in his soul that drove him on.
{Till it be accomplished} (he(9373) hotou telesth(8869)). First aorist
passive subjunctive of 	ele(935c) with he(9373) hotou (until which
time), the common construction for the future with this
conjunction.