when you are looking at understanding a thing, it means that such a thing must have been well tested and not only that, but you must know the way it operate to bring the expected result..
When a man understands a particular issue, he knows better the purpose and the necessity to make it work for him..
Understanding is based on different testing both within one's immediate environment and in the world. Though not all times what you have to do can be tested prior to making them manifested at the physical realm, but it is a must to be well natured and examine them at the realm higher than the physical before their application..
To understand what you have means that you must know and be ascertained that what you have can work for you. The result of what you have to do starts right away from you.. Without having trust and better knowledge on what you do, someone's interference may cause you to neglect or abandon the project out rightly.