As it is said in the teachings, first think that every happiness — day-to-day happiness; future life happiness (deva and human rebirth); nirvana, the blissful state of peace for oneself which is experienced forever; and even the total cessation of the obscurations and completion of realizations, the peerless happiness — comes from the mind.

All the happiness that we experience came from our mind, and all the suffering — hell, hungry ghost, animal, human being —came from our mind. That’s because in the past we created nonvirtue as well as harming others. All our suffering came from that and all our happiness came from virtue. So our mind is the basic creator, not God, not Buddha, Dharma, Sangha.

~ Lama Zopa Rinpoche