In canonical ensemble all energy values are permitted. The distribution of energies of system at temp T follows Gibbs Distribution. My question is simple. Why is it that all energies are permitted?? forget the mathematical derivation. How to understand it physically. Does it not take the same amount of heat for all the copies of the system (in their respectable thermal baths) to raise their temperature,so that equilibrium is achieved with the heat bath. Why do some absorb more heat and some less to attain equilibrium? I am sure that these questions that i ask seem very immature to most of youll guys. But since i am not from physics or chemistry background i have lot of 'knowledge loopholes'