This need to know arises when the answer can be abtained . The suffering in this world is meant to raise just this sensation , this need to understand why we suffer, this drive, this desire is a manifestation of our ego to understand our source and our conection to it
God is a limiting term and the God we are taught as real is just a myth
The conection to source can be experienced and is meant to be experienced . it is meant to be proven by each individual in way that can be experienced by the individual
The universe consists of two forces giving and recieving , negative and positive , we are a manifestation of these two forces
All of creation exists as an intent between these two forces , this is visible either quantatively as in the make up of energy in molecules or qualitively as in the composition of the particles in the molecules
The creative force "giving" caused the created object "taking" to be ,and in all permutations of matter since the original event can be seen this effect
The story we tell about this is irrelevent. It is what it is and it is wonderful and profound and we can sense it when the time is right and we allow our intent to become alligned with the "giving " aspect of reality
A physist will tell you that all subatomic particles are actually just comprised of "intent" it's scientific fact So when your "intent" is in harmony with either force present you will become more aware of it.
Hope that helps (Btw I am speaking from personal experience)