The Holy Spirit will change us if we engage in spiritual disciplines over a long period of time. Those disciplines include regular prayer, regular Bible reading, and regular church attendance. We should also grow in obedience. I listen to a great Bible podcast called "Thru the Bible". You can listen or download it in your native language for free at TTB.org. I also listen to scripture based Christian music for several hours each day. Some days I'm filled with such joy that it's difficult to explain to someone who isn't a fellow believer.