Read Psalms 84:10,11  In these two verses David compares his days spent serving God to days that were used for himself.  Sometimes we think our best days are when we get to do what we want to.  But those days are not our best days, those are selfish days!  We should obey God's Word, the Bible and listen to what God says to do in His Bible.  Only those days serving and obeying God will we look back on and say that they were our best days!  David said that he would rather live 1 day in God's presence obeying God than 1,000 days living his own ways!  Wow!  That is a big difference!  David goes on to say that he would rather be a lowly doorkeeper in God's house than to enjoy living in pleasure in the tents of the wicked.  David said that doing evil was not near as good as serving God as His janitor!  Then David said that God will give grace and glory to us if we follow after the Lord.  If we obey God, He will not withhold anything good from us!  That sounds like a much better deal that Satan has to offer.  Our selfish way does not lead to lasting happiness.  The ways of the wicked only lead to guilty feelings and sorrow.  If we want to be happy, we must follow God's ways!