Sorry, I have to get this off my chest.

Honing = to sharpen

Homing = to (instinctively) return to the nest

Homing in = to converge on

So:

You hone your knife on a whetstone, or your critical faculties on a course in logic.

You home, after you have delivered your message, to the loft – you are a pigeon.

You home in on a solution after racking your brains.

And yes, I know, the misuse of honing is now so common that it will probably be accepted soon, but you can’t sharpen in on something, it does make sense and please think of pedants like me who get a pain in the head every time they see it.

Rant over. Some soothing waterlilies from Kew Gardens to follow.