Bhagavata Purana - On Atoms
Type of Spiritual Experience
A description of the experience
Maitreya said: 'The ultimate truth of that what shows itself in the manifold as being indivisible, one should know to be the infinitesimal particle [paramânu] whose combination [into material forms] creates illusion in man. The supreme oneness of that particle being present within material bodies keeps its original form till the end of time, it is of a continual, unrivaled uniformity. And thus time, my best one, can be measured by the motion of the minutest and largest forms of combinations of particles, of which the Supreme, unmanifest Lord is the great force that controls all physical action. Atomic time is the time taken by an infinitesimal particle in occupying [or vibrating in] a certain atomic space. The greatest of time is the time taken by the existence of the complete of all atoms.
…of which one is reminded by a beam of sunlight falling through a lattice window in which one sees something [a dust-particle] going up in the sky.