Another important Sutra that explains the futility of "studying" Zen Buddhism is the Diamond Sutra (金剛經). Any right minded intellectual without previous exposure to this lineage of Buddhism will likely to have his mind "blown away" by the Buddha's exposition. The Sutra is deconstruction rather than construction!
But then what is important? The most important thing is the Route-to-enlightenment (no matter how difficult Enlightenment can be defined, if at all possible). And the first step is always Morality (rather than meditation!).
In Buddhist lingo it is called Discipline (戒). Or simply "don't do bad things, do good things" 诸恶莫作。诸善奉行。 In Christianity it is like "Love thy neighbour as thyself".
But, why study the Diamond Sutra? Because without such understanding, morality can only lead one to become a virtuous man rather than an enlightened one.