Light is one of the most universal and fundamental symbols. It is the spiritual and the divine, it is illumination and intelligence. Light is the source of goodness and the ultimate reality, and it accompanies transcendence into the Nirvana of Buddhist doctrine. It is the SUN, and it is the avenger of evil forces and DARKNESS. Light is knowledge. Purity and morality are connected terms as well. The masculine principle of evolution is symbolized through light. Cosmic energy, creative force and optimism are all related to light.
http://umich.edu/~umfandsf/symbolismproject/symbolism.html/L/light.html

Turn your face to the sun and the shadows fall behind you.
Maori proverb

everything depends upon his seeking his happiness and that of others in one way only, that is, by perseverance in what is right.
I Ching, chapter 1 (Wilhelm translation)

For this command is a lamp, this teaching is a light, and correction and instruction are the way to life
Proverbs 6:23

Light shines on the righteous and joy on the upright in heart.
Psalms 97:11

The light shines in the darkness, and the darkness has not overcome it.
John 1:5

we are begirt with laws which execute themselves.
Ralph Waldo Emerson

We are the local embodiment of a Cosmos grown to self-awareness.
Carl Sagan

The supreme task of the physicist is the discovery of the most general elementary laws from which the world-picture can be deduced logically. But there is no logical way to the discovery of these elemental laws. There is only the way of intuition, which is helped by a feeling for the order lying behind the appearance, and this Einfuhlung [literally, empathy or 'feeling one's way in'] is developed by experience.
Albert Einstein