I notice that you use plain, simple language, short words and brief sentences. That is the way to write English - it is the modern way and the best way. Stick to it; don't let fluff and flowers and verbosity creep in.
It is a mystery that is hidden from me by reason that the emergency requiring the fathoming of it hath not in my life-days occurred, and so, not having no need to know this thing, I abide barren of the knowledge.
If the desire to kill and the opportunity to kill always came together, who would escape hanging? Framed in a more positive light, this tells us also that if we wish to accomplish a particular thing then we need to increase our level of desire for that thing and to create or seek out the opportunities and right environment for it to happen without fail.
The idea that no gentleman ever swears is all wrong. He can swear and still be a gentleman if he does it in a nice and benevolent and affectionate way.
In our day we don't allow a hundred and thirty years to elapse between glimpses of a marvel. If somebody should discover a creek in the county next to the one that the North Pole is in, Europe and America would start fifteen costly expeditions thither; one to explore the creek, and the other fourteen to hunt for each other.
Do not undervalue the headache. While it is at its sharpest it seems a bad investment; but when relief begins, the unexpired remainder is worth $4 a minute.