Sacred syllable, in a sense, is more than one can take (3,4)
I believe the answer is:
too much
'more than one can take' is the definition.
(to an excessive level)
'sacred syllable in a sense' is the wordplay.
'sacred syllable' becomes 'om' (sacred syllable in many Sanskrit texts).
'in' is an insertion indicator.
'a sense' becomes 'touch' (touch is a kind of sense).
'om' inserted within 'touch' is 'TOO MUCH'.
'is' acts as a link.
(Other definitions for too much that I've seen before include "Excessive amount - far out!" , "Beyond endurance" , "More than enough" , "See 17" , "More than is reasonable" .)