In this contribution, I have derived the transition state theory through a stochastic method using Markov chains. It turns out that the current formulation of the transition state theory is entirely compatible with electron transfer events proceeding through adiabatic transition events, such as electron quantum tunneling. The probability of such adiabatic transition events is encoded in both the height of the activation barrier and the characteristic transition constant that makes up the Gibbs free energy of the transition state. This derivation also emphasizes that the TST, as derived in here, is only valid for sufficiently high activation barriers; at standard conditions, such a barrier should be at least 10 kJ/mol. It has been suggested that electron quantum tunneling is incompatible with TST, requiring an explicit treatment of such events . However, with this derivation, I suggest that the TST is implicitly compatible with electron quantum tunneling. Even more, through the general stochastic model of Markov chains, I could derive both chemical kinetics and classical thermodynamics, including the second law of thermodynamics for the herein examined systems at constant volume and pressure.