How do the stems connect to the roots?' 'Where is the mist coming from?' 'Why does one tree seem darker than another?' These questions are implicitly asked and answered in the process of sketching.
Everything comes to us that belongs to us if we create the capacity to receive it. Every difficulty slurred over will be a ghost to disturb your repose later on. Emancipation from the bondage of the soil is no freedom for the tree.