If you cannot observe it, then you must meditate, contemplate and imagine it. It is wondrous that if you contemplate long enough, then eventually you will see it. When you are able to see something that cannot really be seen - that is wondrous.
People who turn to philosophy expecting to harvest a crop of formulas of wisdom or understanding do not understand--philosophy has such things, but they are merely incidental, not the essence of the matter. Philosophy is about subtilizing and tuning up the coherence and acuity of one's seeing, it is about opening new dimensions for insight, learning to think about what one is doing when one thinks instead of just blundering through the processes of putting thoughts together.
All that the posture of skepticism accomplishes is to freeze the ego in an ignorantist poverty that never stretches or diversifies its resources of imagination or understanding. Any uncultured cretin can close his eyes and try to reduce the issues down to linear simplisms and say, "I am doubting, I am proving my magisterial or sovereign control over my own mind." Doubt is a useful and significant test of one's critical powers, but by itself it bears little if any significant cultural charge of enlightenment or satori; indeed it is the very opposite kind of thing.
Those who have chosen the path of least resistance in life, who cannot bear to bring themselves to make a stern value-judgment in criticism of their own most intimate feelings, achieve what they deserve: not self-understanding but radical self-superficialization, not a discovered but a self-ascribed identity that explains nothing, reveals nothing, means nothing, and ultimately accomplishes nothing culturally or intellectually.
Sadly the very thing that strikes us as obvious always defeats our thinking about it in more penetrating ways: just as the Romans said that "the good is the enemy of the better," so too "the self-evident is the enemy of the very process of clarification or understanding," not to mention the enemy of the "transcendent or ultimate."