opening the door

Gate of knowledge, appellation of Hazrat Ali, Prophet Muhammad's cousin and son-in-law

to close the door

summary, the gist, final decision, the last chapter

the key to success

in the matter (of), relating (to), respecting, in respect (of), as (to)

classification

classified items entered (as fields) under their proper heads

to end, to stop, to control

with regard to this, in this matter

gate, door

snake

every chapter, every circumstance, every science, every door

drivel, talk nonsense, make no sense

nonsense, rant, abusive language, rude talk or drivel

awkward, clumsy, stupid, nonsensical, unmannerly, gawky, improper

chapter about the acceptance of desire

chapter of love

a subtle genius

intelligent, sharp-minded