It's one thing to think that your beliefs are true. In fact all religious people believe this. It's another thing entirely to actually question the foundations of those beliefs and discover for yourself whether your beliefs are verifiably true. If you do not take this second step, your belief is blind. It is nothing but mere assertion without basis. You may as well believe in unicorns and fairies.
"Now faith is being sure of what we hope for, being convinced of what we do not see."
Hebrews 11:1 (NET)
Does truth matter to you? How convinced are you? How deeply have you questioned your faith?