In our life we face troubles and hurdles in every step. There are misery from other organisms (Human being to Bacteria, Virus), misery due to divine interference and misery due to our own Karma as well as life style. But all these can be overcome if we take Naam of Iswara ShriKrishna with a pure heart. There is no point blaming others or our birth or luck for our misery. All these misery is only training for our Karma through which we have to travel towards Mokhsha.