As the Trinitarian doctrine maintains, each of the persons of the Godhead is distinct, yet they are all each, by nature, God.
With time, for example, the past is distinct from the present, which is distinct from the future. Each is simultaneous. Yet, they are not three 'times,' but one. That is, they all share the same nature: time
With space, height is distinct from width, which is distinct from depth, which is distinct from height. Yet, they are not three 'spaces,' but one. That is, they all share the same nature: space.
With matter, solid is not the same as liquid, which is not the same as gas, which is not the same as solid. Yet, they are not three 'matters,' but one. That is, they all share the same nature: matter.
Note that there are three sets of threes. In other words, there is a trinity of trinities. If we were to look at the universe and notice these qualities within it, is it fair to say that these are the fingerprints of God upon His creation? I think so. Not only is this simply an observation, but it is also a good source for an analogy of the Trinity