Every single line has a slope. And that slope tells you where the line is headed. Just follow it.
Get the slope wrong, and you're headed the wrong way. Simple as that.
Even curves have a slope. Every C, S, and I line has one. On the C and S lines, differentiate the slope at each inflection point if you have to.
Be mindful of every slope. Every one of them matters.
暗香疎影 — a faint fragrance in the dark, sparse shadows under moonlight. Quiet elegance with a hidden edge.