Answer:
What can go through glass without breaking it?
Looks like water, but it's heat. Sits on sand, lays on concrete. A play on the eyes, but it's all lies.
It comes only before, it comes only after. Rises only in darkness, but rises only in light. It is always the same, but is yet always different.
What is so fragile that saying its name breaks it?
Scythe of darkness, Shadowโs light. Guiding eye of thirteenth sight.
If itโs information you seek, come and see me. If itโs pairs of letters you need, I have consecutively three. What am I?