The nature of time is perceived by intellectuals variedly. An attempt is made in this paper to reconcile such varied views in the light of the Upanishads and related Indian spiritual and philosophical texts. The complex analysis of modern mathematics is used to represent the nature and presentation physical and psychological times so differentiated. Also the relation between time and energy is probed using uncertainty relations, forms of energy and phases of matter. Key words: classical time; quantum time; cosmic time; qualitative and quantitative times; missing of time; scalar and vector natures of time; special theory of relativity; general theory of relativity; complex time; real and imaginary dimensions of physical time; biological time; time in conscious awareness; past, present and future in physical and psychological times.