There are two kinds of light.

There is the visible light of the sun, by whose aid we can discern the beauties of the world around us—without this we could see nothing.
Nevertheless, though it is the function of this light to make things visible to us, it cannot give us the power to see them or to understand what their various charms may be, for this light has no intelligence, no consciousness. It is the light of the intellect which gives us knowledge and understanding, and without this light the physical eyes would be useless.
This light of the intellect is the highest light that exists, for it is born of the Light Divine. The light of the intellect enables us to understand and realize all that exists, but it is only the Divine Light that can give us sight for the invisible things, and which enables us to see truths that will only be visible to the world thousands of years hence.
It was the Divine Light which enabled the prophets to see two thousand years in advance what was going to take place and today we see the realization of their vision. Thus it is this Light which we must strive to seek, for it is greater than any other.

`Abdu'l-Bahá: Paris Talks