Upright, the Knight of Cups most often signals an approaching offer with real feeling behind it: a confession, an invitation, a message from the person you've been thinking about, a project that calls you with meaning rather than money. If the card is describing you, it's permission for the gesture you keep filing under "too much" - to say it plainly, to ask them out, to show the work to the person it was made for. The card sets its own tempo: not a storming charge but a walking pace, because a feeling needs a form and a moment. A confession tossed off in the elevator loses to a conversation you set an evening aside for. Telling a genuine offer from an empty one is simple: the question "when, and what exactly" doesn't frighten it - it only makes it firmer.
