I do not think there is a person on this forum who at one time or another has had difficulty letting go and not trying to figure out how the outcome will manifest.
I read somewhere that it is the essense of our thoughts and emotions which will manifest and in different ways that we could ever imagine. It is our higher self which is in charge rather than the ego which constantly gets in the way. Some manifestations take years (in our time) to take shape and even then will not be in the way we could ever have imagined. They will be however, from the original idea.
If we follow our highest excitement even though it may not seem related to what we think we wish to manifest this, according to Bashar will eventually lead to the external manifestation.
I set out for example to manifest a new car. This happened fairly quickly as my old car just died on me. My new car is not anyway close to my 'ideal' car but nevertheless, I am really happy with it. I have infact made a successful manifestation but because I let go of thinking how it was going to happen it manifested with great speed.
Think of it like this. The universe has one hell of a job, delivering our manifestations into our own individual lives which has to be within our own belief system and what we are able to take owner ship of. Lots of things will be manifested 'wishy washy' as we (I am a culprit in this ) keep changing our minds. It really is focus, intend and let go and TRUST.