What then is the most important thing to do now? It is to reform our mind, i.e, to adopt a different mindset. For this, we should begin by giving up two things. First, we need to stop the hankering for things of this world, in other words, the attachment to samsara and the yearning for human or celestial rebirths in all future lives. Why ? For if we don't, no matter what practices we take up, they will all be deemed mundane which inevitably will turn out to be a huge obstacle to our progress on the spiritual path. So we must. 

~Depicted from From Believers to Boddhisattvas