To prepare or not to prepare? That is the question.

I have heard many worship leaders begin their time of worship with a phrase similar to "As we begin worshiping..." or "Let us start our worship off...." I wonder how accurate that statement is? In give praise to God it is stated "Worship encompasses all of life. There's not an aspect of our humanists from which worship is not the requisite response" (287). In light of that, is there truly a beginning to worship other than that beginning which takes place at salvation? Is it appropriate to invite a congregation to begin worshiping?  Would it not be more accurate to say "As we continue to worship...."?  It is a sad reality that in a congregation there is the likelihood of many people not coming with a heart prepared to worship.  They have deceived themselves into thinking that worship takes place on a Sunday morning or Sunday evening for an hour or maybe a Wednesday or at some point during the week to meet as a group for prayer, but that as a body of believers, we don't understand that worship is on going  It was stated "Worship encompasses all of life." So I ask, how do you approach a congregation who is not ready to corporately worship, to share with one another the joy of worship?  Is it really the job of the worship leader to help prepare a congregants heart for worship or is it his job to lead that prepared heart in worship?