Contemplation of God’s greatness is not qualitatively different from any other contemplation.
However, because the divine existence in our world is hidden, contemplation upon it must be more strenuous and prolonged.
This contemplation is, in a sense, a kind of solution to an equation or riddle.
The difficult equation: God is one, and a person must delve into this and understand it.
The riddle: Where is God?
A person must solve this as well.
Some suggest the following analogy describing this type of contemplation:
There are magicians who seem to produce rabbits from hats and the like.
In order to detect the deception and see the truth behind the tricks, a person must contemplate carefully, with full concentration, until he clearly and obviously sees the sleight of hand, the lie of the kelipa and the truth hidden behind it.
The method of contemplation adopted by Chabad hasidim follows, in a sense, that same approach:
A person chooses a topic to ponder, thinking about it and examining it repeatedly, each time from a different angle.
He does this until the innermost essence of that topic, despite its foreign ness and abstraction, begins to become reified.
The more tangible and sensory it becomes, the more it leads to an emotional connection, in the form of love and fear of God that are manifest in one’s heart.
Rabbi Adin Steinsaltz