Concentration, "..the light breaks forth and the reality is revealed."
             "Illuminate"      
 "When they assemble in their meeting-house they sit silently and contemplate;
  their leader opens with a certain proposition, and says to the assembly` You
    must meditate on this problem'. Then, freeing their minds from everything else,
they sit and reflect, and before long the answer is revealed to them. Many
abstruse divine questions are solved by this illumination. " From Paris Talk
here for more on the journey of life and search for joy.