Some people keep polishing the key because they are afraid to discover the door is already open.

Endless preparation can be a way of avoiding the discovery that you could have gone through already. As long as you are still getting ready, there is no failure and no change, and the door remains an open question rather than an answered one.

Ask what you are preparing for and whether more preparation is genuinely needed. If you have been ready for a while, try the door this week. The readiness will never feel complete, and it rarely needs to be.