And this is eternal life, that they might know thee the only true God, and Jesus Christ, whom thou hast sent. John 17:3
The only thing that can satisfy us is a personal relationship with Jesus Christ, period! You will not find satisfaction in a church, church organization, or any other group. While it is true that the Bible instructs us as Believers to not forsake the assembling of ourselves among other Believers (Hebrews 10:25), churches and church groups are only meant to point us to Christ and help deepen our relationship with Him. Churches alone cannot bring fulfillment in and of themselves. The Bible also admonishes us not to have only a form of godliness but deny the power thereof (2 Timothy 3:5). By all means attend and support your local church but expect lasting and true fulfillment only from your relationship with Christ!