There will be times when we must lead our teams through large overwhelming change or projects and just the thought of not knowing where to start will paralyze them with fear. You may or soon may be facing these types of situations now with COVID and stay at home forcing you to do business differently.
Leadership is taking the BHAG and presenting it in an attainable way to the team. Making the impossible possible. This is not sugar coating it or making it less the big hairy beast that it is. Your team needs to know the magnitude of the project. They need to know that it is important, and it will certainly be difficult, but not impossible.